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Here's a warning from health experts: Sitting is deadly. Scientists are increasingly warningthat sitting for prolonged periods--even if you also exercise regularly--could be bad for yourhealth. And it doesn't matter where the sitting takes place at the office, at school, in the car orbefore a computer or TV--just the overall number of hours it occurs.

Research is preliminary, but several studies suggest people who spend most of their dayssitting are more likely to be fat, have a heart attack or even die.

In an editorial published this week in the British Journal of Sports Medicine, Elin Ekblom-Bakof the Swedish School of Sport and Health Sciences suggested that authorities rethink how theydefine physical activity to highlight the dangers of sitting.

While health officials have issued guidelines recommending ~nini~num amounts of physicalactivity, they haven't suggested people try to limit how much time they spend in a seated position.

"After four hours of sitting, the body starts to send harmful signals," Ekblom-Bak said. Sheexplained that genes regulating the amount of glucose and fat in the body start to shut down.

Even for people who exercise, spending long stretches of time sitting at a desk is still harmful.Tim Armstrong, a physical activity expert at the World Health Organization, said people whoexercise every day--but still spend a lot of time sitting--might get more benefit if that exercisewere spread across the day, rather than in a single bout.

That wasn't welcome news for Aytekin Can,31, who works at a London financial company,and spends most of his days sitting in front of a computer. Several evenings a week, Can alsoteaches jiujitsu, a Japanese martial art involving wrestling, and also does Thai boxing.

"I'm sure there are some detrimental effects of staying still for too long, but I hope that beingactive when I can helps," he said. "I wouldn't want to think the sitting could be that dangerou

A.he will be likely to be fat
B.he may have a heart attack
C.he may have a stomachache
D.he may even die if sitting too long

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答案： C

本题解析：

根据题干中的“If someone spends most of his days sitting,"可定位至第二段“Research is preliminary，but several studies suggest people who spend most of their days sitting are more likely to be fat，have a heart attack or even die”，由此可知，每天大部分时间都处于静坐状态的人更容易发胖、患心脏病甚至死亡。但文中并没有提到久坐会引起胃痛，故选择C项。