警察/一般警察/鐵路（三四等、員級）◆英文題庫下載題庫

One of the easiest ways to help your health is just to sleep eight hours or more every night. ( 44 ) , more and more people in the world are not sleeping enough. According to the World Health Organization, over half the people in the world may be sleep-deprived. The result of this is not just a lot of tired people; in the United States alone, sleepy drivers ( 45 ) at least 100,000 car crashes and 1500 deaths a year. According to experts, sleep is like ( 46 ) . If you sleep only five hours a day, you don’t “get used to it,” but instead, build up a “sleep deficit.” “It’s like a credit card,” says Dr. Mass. “You are only ( 47 ) time. You always have to pay it back.” The more hours you don’t sleep, ( 48 ) you should sleep to “pay back” the hours on your “sleep credit card.”