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1·Method Purpose sampling combined with quota sampling were adopted, and the data of nursing quality assessment standards of 17 hospitals in China were obtained and analyzed.

结果各医院评价标准所涉及的评价指标不尽相同，同一指标的评价标准条目设立、权重设定差异均较大，且尚无统一的计分方法。

2·The optimum quota for sampling trees and twigs for various density are given , too.

并给出了不同密度条件下样株与枝条的抽样数量配额。