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VOA Special English

编辑：Fiona 来源：英语词汇网点击：16 日期：2008-06-17

But Alaskan officials said such studies are undependable.

A United States Geological Survey study last year estimated that polar bears could disappear from Earth by twenty fifty. About twenty thousand to twenty five thousand polar bears live in the Arctic. But most are in Canadian territory.

VOICE ONE:

Environmental activists had hoped that identifying the animal as threatened would result in carbon dioxide restrictions. But Mister Kempthorne said the government would not use the Endangered Species Act to limit gases from vehicles, power stations and other factories. He said a direct link could not be established between release of the gases and threat to polar bears.

In declaring protection for the bears, the interior secretary also announced a special rule. The rule will let exploration and drilling of oil continue in the Arctic. Mister Kempthorne said these activities do not harm polar bears.

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VOICE TWO:

Last week, we talked about some common medical emergencies. We suggested how to deal with problems such as choking, accidental poisonings and severe bleeding. Today, we will explain how to treat another problem: bleeding from the nose.

Medical experts at America's Mayo Clinic say nosebleeds can end without too much worry, or they can be serious. The experts say children and young adults usually bleed from the septum. The septum separates the two areas of tissue in the nose. This bleeding usually does not require medical attention.

VOICE ONE:

But a nosebleed in middle-aged or older adults can be coming from deep inside the nose. The problem can result from medical conditions including high blood pressure or hardening of the main blood passages. In some cases, the nose just starts bleeding for no clear reason. If you are a middle-aged or older adult with this condition, get medical help.

Also go to a doctor or hospital emergency room if any bleeding lasts longer than twenty minutes. The Mayo Clinic has the same advice if the nose starts bleeding after an accident, fall or blow.