20071012听力原文

一项研究发现,肥胖现象在社交圈中具有传染性。如果一个人体重增加,其朋友、家人随后也更可能发胖。但这一发现也可能带来积极影响,意味着通过社交圈也能促进减肥。研究使用了来自弗雷明汉心脏研究的数据,分析了超过40,000条社交联系,揭示了肥胖在社会关系中的传播模式。

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下面就是20071012的听力原文:

(听力文件在:http://you.video.sina.com.cn/b/7500811-1403022983.html

This is the VOA Special English Health Report.

When one person gains weight, their close friends often follow. Researchers have just offered evidence in a study that says obesity appears to spread through social ties. But the findings might also offer hope.

If friends help make obesity acceptable, then they might also be influential in losing the fat. The researchers note that support groups are already an effective tool in dealing with other socially influenced problems, like alcoholism.

The findings appeared in the New England Journal of Medicine. The researchers used information collected from twelve thousand people. It was collected between nineteen seventy-one and two thousand three as part of the Framingham Heart Study.

The information was highly detailed. There was even contact information for close friends of the people in the study.

The researchers examined more than forty thousand social ties. They found that a person's chances of becoming severely overweight increased by fifty-seven percent if a friend had become obese.

A sister or brother of a person who became obese had a forty percent increased chance of becoming obese. The risk for a wife or husband was a little less than that.

Nicholas Christakis of Harvard Medical School was a lead investigator in the study. He says there is a direct causal relationship between a person getting fat and being followed in weight gain by a friend.

The study found that the sex of the friends was also an influence. In same-sex friendships, a person had a seventy-one percent increased risk of becoming obese. Men had a forty-four percent increased risk of becoming obese after weight gain in a brother. In sisters, it was sixty-seven percent.

The researchers also considered the effect of where people lived in relation to each other. James Fowler of the University of California, San Diego, was the other lead investigator. He says a friend who lives a few hundred kilometers away has as much influence as one in the same neighborhood. He says the study demonstrates the need to consider that a major part of people's health is tied to their social connections.

Both investigators say their research shows that obesity is not just a private medical issue, but a public health problem.

And that's the VOA Special English Health Report. For more health news, go to voaspecialenglish.com. I'm Steve Ember.

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