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(電腦視力綜合癥)."
Nathan Bonilla-Warford is an optometrist(驗光師)in Tampa,F(xiàn)lorida.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(傷害)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 這是一篇科普知識類文章.閱讀短文可以知道:孩子們每天花上幾個小時看著電腦屏幕和其他數(shù)碼設備.一些眼科醫(yī)生說這樣會增加"電腦視覺綜合癥".

解答 67.答案:B細節(jié)理解題,閱讀短文第二段可以找到相關信息: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.由此可以推斷出:正常眨眼眼睛可以保護眼睛干燥.)故選:B.
68.答案:C語義猜測題,Interest興趣,ability能力,difficulty困難,tiredness疲勞,閱讀短文最后一段可以知道:并非所有眼科醫(yī)生注意到兒童問題的增長.David Hunter醫(yī)生認為長時間看屏幕可能會造成疲勞,但沒有證據(jù)證明它會對眼睛造成傷害.故選:C.
69.答案:D主旨大意題,閱讀短文可以知道:一些眼科醫(yī)生認為孩子們長時間觀看屏幕會造成電腦視覺綜合癥,文章2到5段介紹了過多的屏幕時間對眼睛產(chǎn)生的傷害;文章最后一段提到另外一些醫(yī)生認為,長時間看屏幕可能會造成疲勞,但不會對眼睛造成傷害.由此推斷出:"多少屏幕時間對孩子來說比較適宜".故選:D.

點評 首先通讀全文,了解文章大意,然后弄清題干意思,對照短文信息確定正確答案.

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