他们应该针对大众健康制定一个更加宽泛的政策，并且和大众打成一片，持续的对他们进行跟踪调查。
They should have developed broader measures of community health and continually monitored them over time, in partnership with the communities.
在前瞻性研究当中，参与者在一段时间内(例如持续五年)被跟踪调查，基线信息会与后续的信息相比较。
In a prospective study, participants are followed over time (e.g. across five years), and baseline information is compared with later follow-ups.
澳大利亚大学教授Paul Frijters持续化了八年时间跟踪调查了10，000人生活重大事件对他们的影响。
Paul Frijters, an Australian university professor, has spent the last eight years following the effect of major life events on 10, 000 people.
研究人员跟踪调查了5000名高中学生，该调查一直持续直到他们步入中年，总计22年。研究人员每年会记录一次调查对象的体重和体质指数(BMI)。
The researchers followed 5,000 high school seniors until middle age, tracking their body weight and body mass index (BMI) annually for 22 years.
研究人员跟踪调查了5000名高中学生，该调查一直持续直到他们步入中年，总计22年。研究人员每年会记录一次调查对象的体重和体质指数(BMI)。
The researchers followed 5, 000 high school seniors until middle age, tracking their body weight and body mass index (BMI) annually for 22 years.
研究人员跟踪调查了5000名高中学生，该调查一直持续直到他们步入中年，总计22年。研究人员每年会记录一次调查对象的体重和体质指数(BMI)。
The researchers followed 5, 000 high school seniors until middle age, tracking their body weight and body mass index (BMI) annually for 22 years.
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