If you’re training for a marathon , a proper plan for water intake (摄入) is important. Of course, there’s the risk of dehydration (脱水). But athletes now know they can also get into trouble by drinking too much. Too much water intake can lower levels of sodium (钠) in the blood . The death of a 28-year-old woman following the Boston Marathon caught the attention of many runners and led to new research.

Experts advise long distance runners to replace the liquids they sweat out. Their goal is to try to keep someone from not getting dehydrated by more than 2 percent of their body weight.

One technique for deciding how much water you need is to get the exact numbers. Runners have to weight themselves before and after a run to determine how much water they’ve lost. If their weight drops by more than 2 percent, they have not drunk enough water.

Hyponatremia occurs when runners drink so much water that blood salt levels drop off. A study published last year tested 488 runners who completed the Boston Marathon and found 13 percent of them had dangerously low blood salt levels. The first sign that runners may notice is slightly swelling in the hands. They can’t get their rings off, and then they might feel sick. They may not remember where they are. In fact, most runners get enough salt to get back to normal levels by eating just one meal after a run. Contrary to the old advice that runners should drink as much as they can to prevent dehydration , the new research has shown that the body is a remarkable machine that actually tells you via thirst when you need water .

56. The author of this passage is primarily concerned with            .

 A. the signs and treatment for dehydration

 B. the long distance runners who need help

 C. how to manage water intake during a marathon

 D. a 28-year-old woman who died after a Boston Marathon

57. Why do runners have to weigh themselves before and after a run ?

 A. They can improve their performance in a run.

 B. They can learn how much salt there is in the blood.

 C. They can know the quantity of water they’ve lost during a run.

 D. They can decide what kind of water they should take during a run.

58. What conclusion can we draw from the passage ?

 A. Taking much salt during a run can avoid selling in the body.

 B. Either too much or too little of water intake is harmful.

 C. A rich meal is helpful to our performance in a run.

 D. We should take enough salt during a run.

59．According the passage, which of the following statements is correct ?

 A. Too much water intake→blood sodium levels ↓→dehydration.

 B. Too much water intake→blood salt levels ↓→hyponatremia .

 C. No water intake→blood sodium levels↑→hyponatremia .

 D. No water intake →blood salt levels ↓→hyponatrenmia .

Some people don’t mind being fat. Other people can keep slim (苗条) without any effort. But a lot of people do put on too much weight and don’t like it. The question is, what can thy do about it?
Some believe exercise can be helpful. But the trouble is that it only makes you want to eat more. You might sweat out a couple of pounds playing tennis or climbing a mountain, but you put it all back on again with a big steak or bread and jam.
A helpful way is food choosing. But what sort of food should you choose? Some believe that the less they eat, the slimmer they will be. They don’t eat anything until they become weak with hunger. Some stick to milk and bananas. You’ll find you need a lot of bananas, and unless you live where they grow, they aren’t cheap. Another says that if you eat things like hard-boiled eggs, and apples with their skins on which are hard for your stomach to digest (消化), the more you eat, the thinner you get. This is because you use up the fat in your body to get the energy to digest the food.
For most of us these methods are too extreme (极端的). The simplest way is just to cut down on the carbohydrates (糖类) that means not eating bread, potatoes, cakes, sugar, rice, and so on and eating anything else you like. It’s straight forward and often quite effective.
Still others like to be more scientific. They are calorie countries. They get a table, which tells them that, for example, 100 grams of roast let of lamb gives you 330 calories and a 50 gram helping of Yokshire pudding gives you 130 calories.
【小题1】.
. According to the passage, the best way to keep slim is ______.

A．exercising

B．hunger

C．food-choosing

D．eating milk and bananas

【小题2】.
There seems nothing wrong with exercise except that ______.

A．it makes you sweat	B．it’s hard work
C．it tires you out	D．it makes you eat more

【小题3】.
. The practical method suggested here means ______.

A．sticking to bananas	B．not eating many carbohydrates
C．eating as little as possible	D．eating things that are hard to digest

【小题4】.
. Which of the following do you think is the best title for the passage?

A．Don’t Eat Too Much	B．Various Ways of Losing Weight
C．Ways to Keep Fit	D．Food and Health

Some people don’t mind being fat. Other people can keep slim (苗条) without any effort. But a lot of people do put on too much weight and don’t like it. The question is, what can thy do about it?

Some believe exercise can be helpful. But the trouble is that it only makes you want to eat more. You might sweat out a couple of pounds playing tennis or climbing a mountain, but you put it all back on again with a big steak or bread and jam.

A helpful way is food choosing. But what sort of food should you choose? Some believe that the less they eat, the slimmer they will be. They don’t eat anything until they become weak with hunger. Some stick to milk and bananas. You’ll find you need a lot of bananas, and unless you live where they grow, they aren’t cheap. Another says that if you eat things like hard-boiled eggs, and apples with their skins on which are hard for your stomach to digest (消化), the more you eat, the thinner you get. This is because you use up the fat in your body to get the energy to digest the food.

For most of us these methods are too extreme (极端的). The simplest way is just to cut down on the carbohydrates (糖类) that means not eating bread, potatoes, cakes, sugar, rice, and so on and eating anything else you like. It’s straight forward and often quite effective.

Still others like to be more scientific. They are calorie countries. They get a table, which tells them that, for example, 100 grams of roast let of lamb gives you 330 calories and a 50 gram helping of Yokshire pudding gives you 130 calories.

1..

. According to the passage, the best way to keep slim is ______.

A. exercising       B. hunger       C. food-choosing        D. eating milk and bananas

2..

 There seems nothing wrong with exercise except that ______.

A. it makes you sweat                   B. it’s hard work 

C. it tires you out                         D. it makes you eat more

3..

. The practical method suggested here means ______.

A. sticking to bananas                  B. not eating many carbohydrates

C. eating as little as possible             D. eating things that are hard to digest

4..

. Which of the following do you think is the best title for the passage?

A. Don’t Eat Too Much              B. Various Ways of Losing Weight

C. Ways to Keep Fit                     D. Food and Health

 

If you’re training for a marathon , a proper plan for water intake (摄入) is important. Of course, there’s the risk of dehydration (脱水). But athletes now know they can also get into trouble by drinking too much. Too much water intake can lower levels of sodium (钠) in the blood . The death of a 28-year-old woman following the Boston Marathon caught the attention of many runners and led to new research.

Experts advise long distance runners to replace the liquids they sweat out. Their goal is to try to keep someone from not getting dehydrated by more than 2 percent of their body weight.

One technique for deciding how much water you need is to get the exact numbers. Runners have to weight themselves before and after a run to determine how much water they’ve lost. If their weight drops by more than 2 percent, they have not drunk enough water.

Hyponatremia occurs when runners drink so much water that blood salt levels drop off. A study published last year tested 488 runners who completed the Boston Marathon and found 13 percent of them had dangerously low blood salt levels. The first sign that runners may notice is slightly swelling in the hands. They can’t get their rings off, and then they might feel sick. They may not remember where they are. In fact, most runners get enough salt to get back to normal levels by eating just one meal after a run. Contrary to the old advice that runners should drink as much as they can to prevent dehydration , the new research has shown that the body is a remarkable machine that actually tells you via thirst when you need water .

56. The author of this passage is primarily concerned with            .

 A. the signs and treatment for dehydration

 B. the long distance runners who need help

 C. how to manage water intake during a marathon

 D. a 28-year-old woman who died after a Boston Marathon

57. Why do runners have to weigh themselves before and after a run ?

 A. They can improve their performance in a run.

 B. They can learn how much salt there is in the blood.

 C. They can know the quantity of water they’ve lost during a run.

 D. They can decide what kind of water they should take during a run.

58. What conclusion can we draw from the passage ?

 A. Taking much salt during a run can avoid selling in the body.

 B. Either too much or too little of water intake is harmful.

 C. A rich meal is helpful to our performance in a run.

 D. We should take enough salt during a run.

59．According the passage, which of the following statements is correct ?

 A. Too much water intake→blood sodium levels ↓→dehydration.

 B. Too much water intake→blood salt levels ↓→hyponatremia .

 C. No water intake→blood sodium levels↑→hyponatremia .

 D. No water intake →blood salt levels ↓→hyponatrenmia .

 (河南省开封市2008届第四次模拟考试D篇)

If you're training for a marathon   a proper plan for water intake (摄入) is important . Of course , there's the risk of dehydration (脱水) . But athletes now know they can also get into trouble by drinking too much. Too much water intake can lower levels of sodium (钠) in the blood  The death of a 28-year-old woman following the Boston Marathon caught the attention of many runners and led to new research.

    Experts advise long distance runners to replace the liquids they sweat out. Their goal is to try to keep someone from not getting dehydrated by more than 2 percent of their body weight.

    One technique for deciding how much water you need is to get the exact numbers. Runners have to weight themselves before and after a run to determine how much water they've lost. If their weight drops by more than 2 percent , they have not drunk enough water.

Hypothermia (体温过低) occurs when runners drink so much water that blood salt levels drop off . A study published last year tested 488 runners who completed the Boston Marathon and found 13 percent of them had dangerously low blood salt levels. The first sign that runners may notice is slightly swelling in the hands. They can’t get their rings off , and then they might feel sick. They may not remember where they are. In fact , most runners get enough salt to get back to normal levels by eating just one meal after a run. Contrary to the old advice that runners should drink as much as they can to prevent dehydration , the new research has shown that the body is a remarkable machine that actually tells you you need water when you feel thirsty.

68. The author of this passage is primarily concerned with ________.

    A. the signs and treatment for dehydration                                                                                                                                                                                      

    B. the long distance runners who need help

    C. how to manage water intake during a marathon

    D. a 284year-old woman who died after a Boston Marathon

69. What conclusion can we draw from the passage ?

    A. Taking much salt during a run can avoid swelling on the head.

B. Either too much or too little of water intake is harmful.

    C. A rich meal is helpful to our performance in a run .

    D. We should take enough salt during a run.

70. According the passage, which of the following statements is correct ?

    A. Too much water intake is very necessary in a long run.

    B. Too much water intake can lower blood salt levels.

    C. Thirteen of the 488 runners had dangerously low blood salt levels.

    D. Runners should drina as much as they can to prevent dehydration.