江苏省扬州中学2016-2017学年高二下学期期中考试英语试卷_高中英语试卷

江苏省扬州中学2016-2017学年高二下学期期中考试英语试卷

　　Sleepless nights can also mean another kind of misery; when you are tired, you are just plain moody. Too little sleep contributes to irritability and a short temper, so it's easy to snap at your spouse, your friends, your kids or even your co-workers. Over time, relationships can become worse if your insomnia isn’t managed, and you can develop serious mental health conditions, such as depression or anxiety disorder.

　　Taking something at night to help you fall asleep and then downing several Red Bulls during the day might seem like a logical way to combat the problem. But in fact, those substances might be making your sleeping woes worse. For example, contrary to popular belief, a nightcap doesn't help people sleep better. Alcohol can prevent you from sleeping as deeply as you need to or keep you from progressing through all the normal phases of sleep. Recovering alcoholics may also experience withdrawal symptoms that can cause insomnia and tempt(引诱）people back to use alcohol to try to get someSimilarly, narcotic painkillers, sleeping pills and other depressants can lead to dependency, making it difficult for the body to fall asleep on its own. A few drags on a marijuana joint may seem like a harmless way to relax, but as with sleeping pills, the drug can interfere with your natural sleep cycle and even cause you to wake up more frequently during the night.

　　After a sleepless night, it is a struggle just to stay awake and function. Some people take amphetamines or other stimulants to jump-start their days or help them concentrate. But then they struggle to wind down at night and often return to alcohol or sleeping pills to help, and these short-term solutions can quickly turn into a vicious cycle. Even though about one-third of Americans get less than seven hours of sleep each night, only about six percent of adults have a sleep disorder occurring on its own, separate from any other problem. However, many more people suffer from sleep disorders that co-occur with substance use, and each condition can continue to perpetuate the other.