問題詳情

四、閱讀測驗【請在下列各題中選出最適當的答案】Recently, researchers in Michigan and Wayne analyzed the sleep-disruptive effects of caffeine consumption atdifferent lengths of time before bedtime. They found that caffeine consumed even 6 hours before bedtime resulted insignificantly diminished sleep quality and sleep quantity. This is believed to be the first study to investigate directlythe effects of caffeine at specific times before nightly sleep.The study included 12 adult men and women, who were healthy, normal sleepers and moderate consumers ofcaffeine. During the study they kept up their normal sleep routines. Researchers tracked sleep by having participantskeep sleep diaries and by using at-home sleep monitors. Participants were given doses of caffeine in pill form as wellas placebo pills on a schedule that enabled researchers to measure the sleep-disruptive effects of caffeine taken at 3different points: at bedtime, 3 hours before bedtime, and 6 hours before bed. They found significant disruptions tosleep as a result of caffeine taken at all three points.First, caffeine consumed 0, 3, and 6 hours before bedtime significantly reduced total sleep time. Second, caffeineconsumed at all 3 points diminished sleep quality. Finally, disruptions to sleep as a result of caffeine were perceivedby volunteers for caffeine consumed at bedtime and 3 hours before bed, but were not reported for caffeine taken 6hours before bed. However, sleep monitors measuring total sleep time and sleep efficiency showed that caffeineconsumed 6 hours before bedtime had significant detrimental effects to both.This last finding is especially important, because it suggests that people can’t—and shouldn’t—rely entirely ontheir own perceptions of how much or little caffeine affects their sleep, especially caffeine consumed in the afternoon.Even if you don’t feel that late-afternoon cup of coffee has a negative impact on your sleep, this study suggests that itis likely to be interfering nonetheless.
46. What is the purpose of the passage?
(A)To argue for the importance of caffeine consumption in a day.
(B)To illustrate how to sleep well after drinking afternoon coffee.
(C)To dispel the misconception of caffeine overdose before sleep.
(D)To report a recent study on caffeine consumption before sleep.

參考答案

答案：D
難度：適中0.660477
統計：A(17),B(36),C(59),D(249),E(0)

內容推薦

內容推薦