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Lack of sleep can make you fat, while getting enough of it may prevent obesity (肥胖症). Many researches from Columbia University in New York found that you can lose more weight while you are sleeping, if you get enough sleep. A study of more than 6,000 people showed that adequate sleep at night protected them against obesity. On the other hand, lack of sleep promoted obesity. Obesity rates were 73 percent higher in people who slept only two to four hours per night compared to normal sleepers and 23 percent greater in people who got only six hours of sleep.

Inadequate sleep activates the appetite control center in the hypothalamus (in the lower part of the brain) and influences hormones that make you hungrier. Sleeping deprivation (剥夺)decreases physical and mental performance and puts the brakes on your training program. The National Sleep Foundation recommends establishing regular sleep patterns to help you get the rest you need. Avoid common causes of insomnia, such as drinking coffee before bedtime, worrying about money or relationships late at night, or watching disturbing TV shows in the evening.

Taking a short 20-minute nap (小睡) or exercising late in the afternoon will help you sleep at night. Establish healthy sleep patterns by going to bed at the same time each night and don’t turn on any light bulb in your bedroom while you are sleeping. Get exposed to light in the morning. The above tips will help you establish (建立) normal sleep-wakeful cycles. See a sleep specialist if you suffer from insomnia or sleep apnea (temporary absence of breathing during sleep). 

53. What would be the best title for the text?

     A. The importance of proper sleep  

     B. Lose weight by getting enough sleep  

     C. How to have sound sleep                               

     D. Lack of sleep can do you great harm

54. If you have inadequate sleep, you will _____.

     A. feel bored with life

  B. have less appetite for food       

     C. fail to work as efficiently as usual          

     D. not feel like working                     

55. Which of the following can help us improve our sleep quality?

     A. Exposure to light in the morning.      

     B. Going to sleep very early every day.    

     C. Watching lots of interesting TV shows.

D. Taking a short nap just before sleep.                     

   本文是说明文。适当的睡眠可以帮助减肥,而睡眠不足可以导致肥胖。

53. B。主旨大意题。文章主要介绍充足的睡眠可以帮助减肥,并介绍了如何拥有充足的睡眠,因此B项作为文章的标题最佳。

54. C。细节理解题。由文章第二段Sleeping deprivation decreases physical and mental performance and puts the brakes on your training program可知,睡眠不足会导致人们在体力和智力方面表现不佳。

55. A。细节理解题。从文章最后一段可知,早上见到光亮可以使我们形成好的睡眠规律。

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