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  3. Forget milky drinks, hot water bottles or curling up with a good book—the real secret to a good night’s sleep may be where you s

Forget milky drinks, hot water bottles or curling up with a good book—the real secret to a good night’s sleep may be where you s

admin2016-10-18  24
问题     Forget milky drinks, hot water bottles or curling up with a good book—the real secret to a good night’s sleep may be where you sit at work. New research shows office staff stuck in windowless rooms—or with little exposure to daylight—get on average 46 fewer minutes of sleep a night. Those who sit near a window were also found to have less broken sleep and a better quality of life than employees deprived of daylight.
    The findings, published in the Journal of Clinical Sleep Medicine, suggest the working environment may be crucial to setting the body’s own internal clock.
    Researchers say better designed offices could boost the physical and mental health of workers. One in three Britons suffers from poor sleep, with stress, computers and taking work home often blamed for the lack of quality slumber. However, the cost of all those sleepless nights is more than just bad moods and a lack of focus. Regular poor sleep raises the risk of serious medical conditions like obesity, heart and diabetes—and can even shorten life expectancy.
    Adequate exposure to natural daylight is known to be crucial for governing the body’s circadian rhythm—the built-in clock which dictates our sleeping and waking patterns.
    Researchers from the University of Illinois, Northwestern University in Chicago and the Hwa-Hsia Institute of Technology in Taiwan, teamed up to investigate the role of workplace windows in aiding sleep. They recruited 49 office employees, just over half of whom spent the day in mostly windowless environments, while the rest enjoyed frequent exposure to daylight through windows. Each one was quizzed on sleeping patterns, physical activity and general lifestyle. Some of the volunteers also wore hi-tech watches round-the-clock for a fortnight to measure their light exposure, levels of physical activity and sleep/wake times. The results showed those with the most work-time light exposure snoozed an average of 46 minutes more per night than their light-deprived colleagues. They also scored better on a sleep quality scale and reported fewer night-time disturbances-and were more likely to exercise, having got a good night’s sleep.
    In a report on their findings they said: Workers in offices with windows not only had significantly more light exposure during work hours but also slept an average of 46 minutes more per night during the week than those without(access to)windows. Office workers with more light exposure at the work place also tended to have better sleep quality, more physical activity and a better quality of life. We suggest that architectural design of office environments should place more emphasis on sufficient daylight exposure for workers in order to promote health and well-being.
    The study backs up earlier research suggesting that nurses are less likely to face burnout from work-related stress and more likely to achieve job satisfaction if they have exposure to at least three hours of daylight a day. Sleep expert Dr. Neil Stanley said the body needs exposure to daylight to keeps its sleeping patterns on track. "Light is essentially the thing that tells our bodies to be awake and dark tells them to go to sleep. "
    The problem with office lighting is that it is not made up of "blue" light, which is the wavelength of light you get from the sun and which controls your body clock. "So you could have a very well lit office but it does not have the same effect because it’s artificial and does not contain blue light. "
What’s the main idea of the last paragraph?
选项 A、Blue light is the wavelength of light people get from the sun.
B、A very well lit office could control people’s body clock.
C、Office lighting could not promote people’s sleep quality.
D、Blue light does not have the same effect as office lighting.
答案C
解析 推理判断题。题干问最后一段的段落大意，第六段主要讲的是，办公室的灯光里没有蓝光，此蓝光只来自天然日光，并有助于提高人们的睡眠质量，因此办公室灯光不能如天然日光一样起到助眠作用，C)选项“办公室灯光无法提高人们的睡眠质量”，与题意相符，故选项C)正确。
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