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  3. The field of medicine has always attracted its share of quacks (庸医；江湖医生). The masons why quackery thrives even in modern times a

The field of medicine has always attracted its share of quacks (庸医；江湖医生). The masons why quackery thrives even in modern times a

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问题     The field of medicine has always attracted its share of quacks (庸医；江湖医生). The masons why quackery thrives even in modern times are not hard to find. To begin with, pain seems to be a chronic human condition. A person who suffers from some illness for a long time will pay any amount of money for the promise of relief. Second, even the best medical treatment can not cure all the ills. Third, many people lack the training necessary to evaluate medical claims. However, most remedies sold by quacks are not only useless, but often can be harmful to the user as well. By far the most potent reason that quack medicines still are sold around the world has to do with the power of "mind over matter". Your brain is the master organ of your body: It regulates all the chemical processes that keep you alive and well. When you become depressed and lose hope, your autonomic nervous system (植物神经系统) slows down these bodily processes and retards your chances of getting well. When you have hope and faith, these processes are speeded up. You are thus likely to recover even from the most dreadful diseases.
    The doctor who can convince the patients of their recovery cures more patients than the one whose behavior causes patients to lose faith in themselves. If a patient mistakenly believes that his condition can be cured by taking a drug of some kind, most physicians are happy to give him a placebo. The placebo does no harm at all, but it may so help the patient psychologically that the person’s pain diminishes and the patient may actually recover much faster than without taking the pill. Indeed, placebos may even have a physiological effect.
What conclusion can be logically drawn from the selection?
选项 A、Only poorly educated people seek the advice of quacks.
B、Quacks are motivated by the desire to help mankind.
C、A person’s brain can not control the body’s pain-tolerance level.
D、The human brain is a powerful and mysterious organ.
答案D
解析 文中“mind over matter”意为“精神作用”，是本文的主题。在全篇均可看到精神作用对疾病的恢复起到了一定的作用，故D为正确答案。
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