单选题
If you"re among the 24 million Americans who work from dusk to dawn, don"t underestimate the physical and emotional costs of punching the clock in the dark.
Compared with day workers, night workers are five times more likely to get stomach diseases, twice as likely to smoke cigarettes or use stimulants, and at higher risk for high blood pressure, heart. attack, and breast cancer. And if you have kids, your divorce risk is three to six times higher than normal.
"You"re out of sync with everything and everybody," says Acacia Aguirre, MD, PhD, author of an eye-opening new report. Your biological clock is thrown off, too. How to survive: "A healthy lifestyle matters even more," Aguirre says. "Exercise, limit coffee, and fit in 7 to 8 hours of sleep per day."
单选题
What does it mean by "punching the clock" (Line 2, Para.1)?
【正确答案】
A
【答案解析】[解析] 从“punching the clock in the dark”可以推测出意思。既然前面和后面都在谈白班工人和夜班工人，因此，punching the clock in the dark 肯定指夜间工作。
单选题
According to the text, night workers are more likely to ______.
【正确答案】
A
【答案解析】[解析] 文章的第二段的第一句：Compared with day workers，night workers are five times more likely to get stomach diseases，与白班工人比，夜班工人得胃病的概率要高出五倍。
单选题
Which of the following suggestions is made by Aguirre?
【正确答案】
B
【答案解析】[解析] 答案在最后一段：Aguirre says，“Exercise，limit coffee，and fit in 7 to 8 hours of sleep per day.”