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For millions of years before the appearance of the electric light, shift wor
For millions of years before the appearance of the electric light, shift wor
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2025-03-21
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问题
For millions of years before the appearance of the electric light, shift work, all night cable TV and the Internet, Earth’s creatures evolved on a planet with predictable and reassuring 24-hour rhythms. Our biological clocks are set for this daily cycle. Simply put, our bodies want to sleep at night and be awake during the day. Most women and men need between eight and eight and a half hours of sleep a night to function properly throughout their lives. (Contrary to popular belief, humans don’t need less sleep as they age. )
But on average, Americans sleep only about seven and a half hours per night, a marked drop from the nine hours they averaged in 1910. What’s worse, nearly one third of all Americans get less than six hours of sleep on a typical work night. For most people, that’s not nearly enough.
Finding ways to get more and better sleep can be a challenge. Scientists have identified more than 80 different sleep disorders. Some sleeping disorders are kinetic (活跃的, 有力的).But many problems are caused by staying up late and sleeping in, by traveling frequently between time zones or by working nights. Dr. James F. Janes at National Jewish Medical and Research Center in Denver says that sleep disorders are often diagnosed as other discomforts. About one third of the patients referred to him with possible chronic (慢性的,长期的) fatigue syndrome actually have treatable sleep disorders. "Before we do anything else, we look at their sleep," Jones says.
Sleep experts say that most people would benefit from a good look at their sleep patterns. "My motto is ’Sleep defensively’," says Mary Carskadon of Brown University. She says people need to carve out sufficient time to sleep, even if it means giving up other things. Sleep routines—like going to bed and getting up at the same time every day—are important. Pre-bedtime activities also make a difference. As with Eisner, who used to suffer from sleeplessness, a few lifestyle changes—avoiding stimulants and late meals, exercising hours before bedtime, relaxing with a hot bath—yield better sleep. [br] "Sleep defensively" means that______.
选项
A、people should go to a doctor and have their problems diagnosed
B、people should exercise immediately before going to bed every night
C、people should sacrifice other things to get enough sleep if necessary
D、people should give up going to bed and getting up at the same time every day
答案
C
解析
本题是一道涉及词组含义类问题。根据该词组所在的上下文,第四段第一句、第二句和第三句话指出,睡眠专家们说,多数人可以通过关注自己的睡眠习惯而得益,卡斯克顿说:“我的座右铭是进行保护性睡眠。”此处“进行保护性睡眠”是指下一句中他所说的话,即人们需要留出足够的睡眠时间,即使这意味着放弃其他的事情。因此,本题的正确答案应是C“必要的话,人们应该牺牲其他的事以确保足够的睡眠”。
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