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Children who spend more time outdoors ma...

Children who spend more time outdoors may have a lower risk of becoming nearsighted, new research suggests.

In the study, researchers looked at about 1,900 schoolchildren. The scientists found that the kids who had been instructed to spend more time outdoors over three years were 23 percent less likely to develop nearsightedness during this time than those who had not been instructed to spend more time outdoors. Moreover, among the kids who did become nearsighted during the study, the degree to which their eyesight worsened was slightly smaller among those who spent more time outdoors.

The researchers selected six schools and required the children, whose average age was 7 at the start of the study, to attend one additional 60-minute class of outdoor activities during each school day for three years. The parents of these children were also encouraged to engage their children in outdoor activities after school, especially during weekends and holidays. The other half of the children, from another six schools, continued their usual activity patterns. After three years, 30.4 percent of the kids in the intervention(干预) group had become nearsighted, compared with 38.5 percent of the kids in the other group.

It is not clear exactly why spending more time outside would benefit children’s eyesight, the researchers said. However, some research has suggested that the higher levels of light intensity found outdoors may increase the release of the chemical dopamine(多巴胺) of the eye. In turn, dopamine is known to restrain the type of growth in the eye that is associated with nearsightedness.

Based on the new results, the researchers recommend that children spend more time outdoors because of the potential benefits to their eyesight. However, it’s important to protect kids’ skin and eyes from UV light, which can be damaging.

1.What did the children in the intervention group do during each school day?

A. Continue to do their usual activities.

B. Spend one hour in doing eye exercises.

C. Attend an extra class of outdoor activities.

D. Participate in outdoor activities with parents.

2.What can we learn about the chemical dopamine?

A. It can control people’s growth.    B. It can lead to poor sight.

C. It means low levels of light intensity.    D. It is good to eyesight.

3.What does the underlined word “restrain” in Paragraph 4 probably mean?

A. recover.    B. increase.

C. limit.    D. convey.

4.What may be discussed in the following paragraph?

A. How to prevent kids becoming nearsighted.

B. How to protect kids’ skin and eyes from UV light.

C. How to encourage kids to join in outdoor activities.

D. How to design outdoor activities for kids to cure their nearsightedness.

 

1. C 2. D 3. C 4. B 【解析】 本文是一篇说明文,研究人们发现多参加户外活动能够减少孩子患近视的可能性,本文分析了其中的科学原理。 1.细节理解题。根据第三段第一句“The researchers selected six schools and required the children, whose average age was 7 at the start of the study, to attend one additional 60-minute class of outdoor activities during each school day for three years.”可知这些孩子被要求每天都要参加额外的一个小时的课外活动。故C项正确。 2.推理判断题。根据第四段中的"In turn, dopamine is known to restrain the type of growth in the eye that is associated with nearsightedness"可知多巴胺对视力是有好处的。故选择D项。 3.猜测词意题。划线词前面一句“outdoors may increase the release of the chemical dopamine(多巴胺) of the eye.”可知户外活动会增加多巴胺的释放,而多巴胺对视力是有好处的。多巴胺可以限制对近视产生不好影响的物质的产生。故C项正确。 4.推理判断题。根据最后一句中"it’s important to protect kids’ skin and eyes from UV light"可推知,接下来作者很可能会讲怎样保护孩子的皮肤和眼睛免受紫外线的伤害。故选择B项。
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Boys who have done best in the classes win scholarships and are sent to the Sunrise Boarding School.About 30 boys have won this kind of financial aid. All the students are male, because few girls in Rwanda live freely on the street.

The Rwanda program is the largest one set up by the Rebecca Davis Dance Company, founded and directed by Rebecca Davis. Ms.Davis has also set up dance programs in Bosnia-Herzegovina and Guinea.About 2,000 children in the three countries have taken part in the project since it was begun in 2010.

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D. The project could date back to the year 2010.

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C. It has short-term effects.    D. It makes him puzzled.

 

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