Which part of the world has the most nearsighted students? Just look around you–it’s East Asia. Nine in ten school leavers in major East Asian cities are nearsighted, according to the BBC. Experts s 题目和参考答案——青夏教育精英家教网—

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Which part of the world has the most nearsighted students? Just look around you–it’s East Asia. Nine in ten school leavers in major East Asian cities are nearsighted, according to the BBC. Experts say books and video games are not to blame. East Asian students, they say, aren’t getting enough sunlight.
People become nearsighted because their eyeballs grow out of shape and light entering their eyes cannot focus correctly. The body can produce a chemical called dopamine (多巴胺) to stop eyeballs from changing shape. And guess what scientists have just discovered? Sunlight can help our bodies produce more dopamine, reported AFP.
According to the study, primary school students in Singapore spend only 30 minutes outdoors every day; in Australia, by contrast, kids spend about three hours a day outside. As a result, fewer children in Australia are nearsighted–only 10 percent, compared with 90 percent in Singapore.
“Children in East Asia basically go to school... go home and stay inside. They study and they watch television,” Ian Morgan of the Australian National University told AFP.
But being a bookworm or a couch potato does not directly harm the eyes, added Morgan. “As long as they get outside, it doesn’t seem to matter how much study they do,” he explained. “There are some kids who study hard and get outside and play hard and they are generally fine. The ones who are at major risk are the ones who study hard and don’t get outside. As a result of massive (巨大的) educational pressures and the construction (构成) of a child’s day, the amount of time they spend outside in bright light is minimized.”
Experts suggest children should stay outside for two to three hours every day. This can include time spent in the playground and walking to and from school.
小题1:Which of the word has the similar meaning as the underlined phrase “nine in ten”?

A．many

B．few

C．some

D．most

小题2:What is the main reason for the large number of nearsighted students in East Asia, according to scientists?

A．Too much reading or gaming.	B．Lack（缺少）of sunlight.
C．Genetic reasons.	D．Lack of exercise.

小题3:What can we conclude from Paragraph 2?

A．Dopamine is a chemical that causes eyeballs to grow out of shape.

B．Dopamine can stop light entering the eyes from focusing correctly.

C．Spending time in the sun can make the loss of dopamine in the body.

D．The more dopamine a person has in their body, the better eyesight he or she has.

小题4:According to Morgan, what kind of people are most likely to suffer from nearsightedness?

A．Those who like watching TV.

B．Those who take exercise regularly.

C．Those who study hard and play hard outdoors.

D．Those who stay indoors studying all day

小题1:D
小题2:B
小题3:C
小题4:D

试题解析：本文大意：根据BBC报道在东亚的主要大城市中有十分之九的毕业生是近视眼，专家说书本和视频没有责任，他们没有获得足够的阳光。AFP报道阳光可以帮助我们的身体产生更多的多巴胺，阻止眼球变形。风险高的群体是学习刻苦又不去户外的那部分人。
小题1:细节理解题。根据Which part of the world has the most nearsighted students?世界上哪个国家有最多的近视眼学生？可知选D
小题2:细节理解题。根据East Asian students, they say, aren’t getting enough sunlight.他们说东亚的学生们没有得到充足的阳光，可知选B
小题3:细节理解题。根据 Sunlight can help our bodies produce more dopamine, reported AFP.AFP报道阳光可以帮助我们的身体产生更多的多巴胺，可知选C
小题4:细节理解题。根据The ones who are at major risk are the ones who study hard and don’t get outside.风险高的群体是学习刻苦又不去户外的那部分人，可知选D

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