方法采用多阶段整群抽样和配额抽样相结合的方法，对深圳市1 320名居民进行入户问卷调查。
Methods Random sample were obtained from the whole population by multiple stratified cluster and 1 320 objects were surveyed in their own homes by questionnaires.
并给出了不同密度条件下样株与枝条的抽样数量配额。
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。
The optimum quota for sampling trees and twigs for various density are given , too.
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