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5.Children can spend hours a day looking at computer screens and other digital devices.Some eye doctors say this leads to an increase in"computer vision syndrome(电脑视力综合症)."
Nathan Bonilla-Warford is an optometrist(验光师)in Tampa,Florida.He has seen an increase in problems in children."A lot more children come into the office either because their parents have noticed that they have headaches or red or watery eyes or discomfort,or because their nearsightedness appears to be increasing and they're worried,"he says.
Dr.Bonilla-Warford says part of the problem is that children may be more likely to pay no attention to early warning signs than adults."Even if their eyes start to feel uncomfortable or they start to get a headache,they're less likely to tell their parents,because they don't want to have the game or the computer or whatever taken away,"he explains.
He says another part of the problem is that people blink(眨眼)less often when they use digital devices.He says,"A person who uses an electronic device blinks about one third as much as we normally do in everyday life.And so that can result in the front part of the eye drying and not staying protected like normal."
Eye doctors offer suggestions like following which is known as the 20/20/20rule.That means every twenty minutes look away twenty feet or more for at least twenty seconds from whatever device you're using.
Other suggestions include putting more distance between you and the device and using good lighting.Of course,another way is to spend less time looking at screens.Many experts say children should spend no more than two hours a day using digital devices-with no screen time for children under two.
But not all eye doctors have noticed an increase in problems in children.Dr.David Hunter,from Children's Hospital Boston,has not seen an increase in his practice."While it is possible to develop fatigue looking at screens for a long period of time,there's certainly no proof that it actually causes any damage(伤害)to the eyes"he says.
67.Which of the following is true according to the passage?B
A.Dr.Bonilla-Warford thinks using computers causes nearsightedness.
B.People keep their eyes protected against drying by blinking normally.
C.Children under two can watch TV for less than two hours a day.
D.Dr.David Hunter says headache causes an increase in eye problems.
68.What does the underlined word"fatigue"mean?
A.Interest              
B.Ability            
C.Tiredness.
D.Difficulty.
69.What can be the best title for the passage?D
A.Looking at Screen:Two Hours or More
B.How Can Children Use Their Eyes Properly
C.Using Digital Devices:Advantages and Disadvantages
D.How Much Screen Time Is Too Much for Children.

分析 这是一篇科普知识类文章.阅读短文可以知道:孩子们每天花上几个小时看着电脑屏幕和其他数码设备.一些眼科医生说这样会增加"电脑视觉综合症".

解答 67.答案:B细节理解题,阅读短文第二段可以找到相关信息:A person who uses an electronic device blinks about one third as much as we normally do in everyday life.And so that can result in the front part of the eye drying and not staying protected like normal.由此可以推断出:正常眨眼眼睛可以保护眼睛干燥.)故选:B.
68.答案:C语义猜测题,Interest兴趣,ability能力,difficulty困难,tiredness疲劳,阅读短文最后一段可以知道:并非所有眼科医生注意到儿童问题的增长.David Hunter医生认为长时间看屏幕可能会造成疲劳,但没有证据证明它会对眼睛造成伤害.故选:C.
69.答案:D主旨大意题,阅读短文可以知道:一些眼科医生认为孩子们长时间观看屏幕会造成电脑视觉综合症,文章2到5段介绍了过多的屏幕时间对眼睛产生的伤害;文章最后一段提到另外一些医生认为,长时间看屏幕可能会造成疲劳,但不会对眼睛造成伤害.由此推断出:"多少屏幕时间对孩子来说比较适宜".故选:D.

点评 首先通读全文,了解文章大意,然后弄清题干意思,对照短文信息确定正确答案.

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