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  3. Using a computer or smartphone at night can cause us to pile on the pounds, new research has revealed. The study found a link be

Using a computer or smartphone at night can cause us to pile on the pounds, new research has revealed. The study found a link be

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问题     Using a computer or smartphone at night can cause us to pile on the pounds, new research has revealed. The study found a link between blue light【C1】______—blue light is emitted by smartphones and tablets—and increased hunger. It found that exposure to the light【C2】______hunger levels for several hours and even increases hunger levels after eating a meal. Results of the US study show that blue-enriched light exposure, compared with【C3】______light exposure, was【C4】______with an increase in hunger that began 15 minutes after light onset and was still present almost two hours after the meal. Blue light exposure has also already been shown to decreased【C5】______in the evening increasing the risk of insomnia.
    Study co-author Ivy Cheung, of Northwestern University, in Chicago, said: "A single three-hour exposure to blue-enriched light in the【C6】______impacted hunger and glucose metabolism(新陈代谢). ""These results are important because they suggest that【C7】______environmental light exposure for humans may represent a novel approach of influencing food intake patterns and metabolism." The study group【C8】______10 healthy adults with regular sleep and eating schedules who received identical carbohydrate-rich meals. They completed a four-day trial under dim light conditions, which involved exposure to less than 20 lux during 16 hours【C9】______and less than three lux during eight hours of sleep.
    Ms Cheung said more research is needed to determine the【C10】______of action involved in the relationship between light exposure, hunger and metabolism.
A)awake B)exposure C)mode D)dim
E)manipulating F)sleepiness G)increases H)making
I)comprised J)associated K)mechanisms L)dark
M)referred N)slightly O)acutely
【C9】
选项
答案A
解析 根据and后面的“在8小时的睡眠期间接受低于3勒克斯的光照”可知，and前后内容应该形成对比，即“在每日16小时的清醒状态下接受低于20勒克斯的光照”，故选A。
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