患者，男性，28岁。间断腹痛、腹泻、脓血便3年，加重2周。排便8～10次/日，伴发热

Ali is from a Middle Eastern country. He now stays in the USA. He smokes a lot of cigarettes every day. He has smoked for nine years. Ali says, “I tried to quit smoking in my hometown, but it was impossible. My parents smoke. My brothers smoke. All my friends smoke. At parties and at meetings, almost all the men smoke. Here in the United States, not as many people smoke. 小题1:    ”
Many smokers are like Ali: they want to stop smoking.     小题2:      They know it can cause cancer and heart disease. But it is difficult for them to give up smoking because cigarettes have a drug in them. The drug is nicotine. People who smoke a lot need nicotine.
 小题3:     The nicotine makes him sick. In a few days, the smoker's body is used to the nicotine, and he feels fine. Later, the smoker needs nicotine to keep feeling fine. Without nicotine, he feels bad.
 小题4:     Many people who quit will soon smoke again. At a party or at work they will decide to smoke "just one" cigarette. Then they will smoke another cigarette, and another. Soon they become smokers again.    小题5:    

A. It is very hard to quit smoking. B. It will be easier to change the smoking habit here. C. Thus nicotine makes smokers addicted to cigarettes.   D. The smokers know that smoking is bad for their health.  E. When a person first begins to smoke, he usually feels terrible. F. Maybe there is only one easy way to quit smoking: never start. G. But it is said that medicine is needed to stop them from smoking.