According to a 1999 National Health survey.

根据1999年国家健康普查。

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National Health Survey agrees: After age 30, we "become more realistic and do not view happiness as a goal in itself."

一项全国性的健康调查也揭示了同样的结果：30岁过后，我们变得更加实际，不把幸福当成生命本身的一种目标。

youdao

A National Health Survey agrees: After age 30, we "become more realistic and do not view happiness as a goal in itself."

一项全国性的健康调查也提示了同样的结果：30岁过后，我们变得更加实际，不把幸福当成生命本身的一种目标。

youdao

The researchers used a national long-term survey of adolescent health to investigate the relationship between media use and depression.

VOA: special.2009.02.11

American researchers used a national long-term survey of adolescent health to investigate the link between media use and depression.

VOA: special.2009.03.10

India's current National Family Health Survey shows that more than twenty percent of Indians living in cities are overweight or obese.

VOA: special.2010.05.12

National statistics on smoking are provided by two federal surveys, the National Health Interview Survey (NHIS) and the National Survey on Drug Use and Health (NSDUH).

FORBES: Are Federal Taxes Driving Smokers to Stop Lighting Up?

The researchers examined the records of almost 217, 000 Americans who participated in the National Health Interview Survey between 1997 and 2004.

FORBES: The Smoking Gun: Women Catch Up To Men On Lung Cancer Risk

And just 5.5% of 30, 000-plus Americans included in a National Health Interview Survey said they communicated with a health-care provider by email in 2011, up slightly from 4.6% in 2009.

WSJ: When Email Is Part of the Doctor's Treatment