[单项选择]
Taking a Nap During the Day
Medical experts say most Americans do not get
(51) sleep. They say more Americans need to rest for a short period in the middle of the day. They are advising people to sleep lightly before
(52) with other activities.
One study earlier this year found that persons who sleep for a few minutes during the day were less
(53) to die of disease. The study followed more than 2,300 Greek adults
(54) about six years. Adult who rested for half an hour
(55) three times a week had a 37 percent lower risk of dying from heart disease than those who did not nap.
Study organizers said the strongest evidence was in working men. They said naps might improve
(56) by mitigating tension caused by work.
Some European and Latin American businesses have supported the
(57) of napping for many years. They urge people to
(58) work, go home and have a nap before return
A. ready
B. good
C. sleepy
D. awake