That is not to say that the post-1980's has become a monolithic group of people or the society has become stratified because of this, nor is this an imagined community.
这并不是说80后已经抱成一团，或者说社会有分层结构，也不是说这是一个虚幻的团体。
This research adopts investigation methods of stratified sampling and cluster sampling, chooses 95 community health service organizations in 14 cities of Liaoning Province as a analysis sample.
采取分层整群抽样的调查方法，选取辽宁省14个市95家社区卫生服务机构作为分析样本。
Groups were stratified by place of residence (community or long-term care).
组别分配依据居住场所(社区或长期护理)。
Methods Subjects were collected from community population by stratified multi-stage cluster sampling method. The data gathered from case investigation and serological detection.
方法对社区人群采用多阶段分层整群随机抽样方法抽取研究对象，进行个案调查和血清学检测。
Methods Subjects were collected from community population by stratified multi-stage cluster sampling method. The data gathered from case investigation and serological detection.
方法对社区人群采用多阶段分层整群随机抽样方法抽取研究对象，进行个案调查和血清学检测。
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