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There is an English saying: "Laughter is best medicine." Until recently, few people took the saying seriously. Now, however, doctors have begun to look into laughter and the effects it has on the human body. (76)They have found that laughter really can improve people’s health. Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their heart, blood pressure, breathing and muscles. (77) It was found that laughter has similar effects to physical exercise. It increases blood pressure, the heart beating and breathing; it also works several groups of muscles in the face, the stomach, and even the feet. If laughter exercises the body, it must be beneficial. Other tests have shown that laughter appears to be able to reduce the effect of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group that tolerated the pain for the longest time was the group which listened to a funny program. The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemicals in the brain which diminish both stress and pain. As a result of these discoveries, some doctors in the United States now hold laughter clinics, in which they help to improve their patients’ condition by encouraging them to laugh. They have found that even if their patients do not really feel like laughing, making them smile enough to produce beneficial effects similar to those caused by laughter. The purpose of doctors holding laughter clinics is ______.
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如何理解焦虑与学习的关系
It was found that laughter has similar effects to physical exercise.
Most insurance companies in the world are stock insurance companies or mutual insurance companies. A stock insurance company is owned by stockholders, who share in profits earned by the company. A mutual insurance company is owned by the policyholders (投保人). Profits earned by a mutual insurance eompany are returned to the policyholders as dividends (股息) or used to cut future insurance cost.In addition to the private insurance organizations, certain types of insuranee are provided in the U. S. by governmental organizations. A notable instance is the system of social security operated by the federal government through the Social Security Administration.An insurance company may require a policyholder to provide proof of the ownership and the value of lost or damaged property before it pays compensation. For this reason, policyholders should have such evidence of their possessions as lists, sales receipts, appraisals (估价单), or photographs. The evidence should be kept in a safe-deposit box or other secure place outside the home.Many companies that sell health insurance policies (保险) provide cash benefits to the insured person. A cash benefit is a fixed dollar amount for each medical expense or day of hospitalization. If the cash benefits do not cover the entire cost of medical care, the policyholder must pay the rest. If a person buys a health insurance policy, he can receive（）
教学不是知识的传递，而是知识的______。
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