People who averaged fewer than seven hours of sleep per night in the weeks before being exposed to the cold virus were nearly three times as likely to get sick as those who averaged eight hours or more, a new study found.
Researchers used frequent telephone interviews to track the sleep habits of more than 150 men and women aged 21 to 55 over the last few weeks. Then they exposed the subjects to the virus, quarantined (检疫隔离) them for five days and kept track of who got sick.
Besides sleeping more, sleeping better also seemed to help the body fight illness: Patients who fared better on a measure known as “sleep efficiency”—the percentage of time in bed that you’re actually sleeping—were also less likely to get sick.
The results held true even after researchers adjusted for elements such as body-mass index, age, sex, smoking and pre-existing antibodies (抗体) to the virus.
The researchers aren’t exactly sure why sleeping better makes you less likely to develop a cold. But they do try to give an answer: “Sleep disturbance influences the regulation of symptom mediators (调节因子) that are released in response to infection.” In plain English, maybe tossing and turning when you’re infected with the cold virus contributes to the symptoms that define a cold.
The researchers were based at Carnegie Mellon, the University of Pittsburgh and the University of Virginia, and the study was funded by the National Institutes of Health.
【小题1】 According to the passage, what does the underlined word “subjects” mean in paragraph 2?A．areas of knowledge in a schoolB．people being studied in an experimentC．research topicsD．animals being tested【小题2】It is shown in the passage that .A．the researchers obtain information about the sleep habits by frequent interviewsB．the researchers do their research in the National Institutes of HealthC．people hope to avoid being infected with a cold by sleeping as much as possibleD．sleeping more and better helps regulate the symptom mediators【小题3】What’s the best title of the passage?A．The Relationship Between Virus and ColdB．How to Sleep WellC．Good Sleep Helps Fight a ColdD．The More the Sleep, the Better Your BodyB
网友回答
(答案→)B
解析： 本文主要讲述的是有充足的睡眠以及高质量的睡眠对我们的健康有很大的好处，尤其可以增强我们的抵抗力，不容易感冒。
【小题1】B推理题。根据本段Researchers used frequent telephone interviews to track the sleep habits of more than 150 men and women aged 21 to 55 over the last few weeks. Then they exposed the subjects to the virus,可知这里的subjects就是指接受研究的150多个男性和女性的研究对象，让他们接触到细菌。故B正确。
【小题2】D细节题。根据文章3,4段Besides sleeping more, sleeping better also seemed to help the body fight illness和The results held true even after researchers adjusted for elements such as body-mass index, age, sex, smoking and pre-existing antibodies (抗体) to the virus.可知有充足的睡眠时间以及很好的睡眠质量会调节我们的身体，让我们更能够抵抗感冒。故D正确。
【小题3】C主旨大意题。根据文章第一段People who averaged fewer than seven hours of sleep per night in the weeks before being exposed to the cold virus were nearly three times as likely to get sick as those who averaged eight hours or more, a new study found可知睡眠时间较长的人身体更好，更不容易患感冒。故C正确。