丧失的工作机会：519 000。
In 2006, there were 2, 519 health facilities with 138, 000 medical professionals working in the city.
2006年，上海市共有2519个医疗机构及13万8千名专业从医人员。
Methods With stratified cluster sampling method, 2 519 students were questionnaired in Anhui province.
方法采用分层整群抽样方法，对安徽省2 519名中小学生进行问卷调查。
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