Method: 362 cases of Lizu elderly people who were investigated by a random sampling procedure were interviewed by using MOS SF-36 questionnaire.

方法：采用随机、整群抽样的方法，应用生命质量量表（SF-36健康量表），对五指山市362名黎族老年人进行入户问卷调查。

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Different priority rules are adopted in the random sampling procedure, and a statistical test shows that they affect the performance of the proposed random sampling method.

通过对比分析，说明不同的任务优先规则对随机抽样算法具有不同的影响，其中采用MINSLK等优先规则的随机抽样算法能够有效地缩短项目平均工期。

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Although random sampling used for many surveys fails to cover large segments of the population, the procedure nonetheless offers insight into voting and consumption patterns.

虽然许多调查所用的随机取样不能覆盖大部分人口，但是这一过程使人们能更深刻地理解选举和消费的模式。

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