从豪宅到专机：美国总统们衰老快但寿命长_BEC初级作文

从豪宅到专机：美国总统们衰老快但寿命长

从豪宅到专机：美国总统们衰老快但寿命长1

The findings don't prove definitively that stress of the presidency has no effect on the life span of presidents. It may still take years off their lives; the research doesn't compare them to men of similar wealth and position, such as members of Congress.

Still, "they did a lot better than one would have predicted, given the circumstances that they were in," said study author S. Jay Olshansky, a professor of public health at the University of Illinois at Chicago. "There's no evidence that they're dying earlier."

Olshansky also thinks he's shot down one assumption: that each year in the White House typically takes two years off a president's life. A recent news report about that assumption, prompted by photos that showed the aging of President Obama, led Olshansky to try and see if there was any truth to it.

He was skeptical because presidents share three traits that have been linked to longer life spans: wealth, education and access to health care. "They've scored the trifecta," he said.

Olshansky compared the life spans of presidents who died of natural causes to the life spans of men who were of the same age as the presidents when they were inaugurated. There was a hitch, however, because full American statistics from 1789-1899 weren't available; Olshansky compared presidential life spans in that era to statistics from France, where he thinks men would have lived about as long as in the United States.