Methods: Nonrandom purposive sampling was used to select key respondents to conduct indepth interview.

方法：采用非随机、目的抽样方法选择被访者，对关键知情人进行个人深入访谈。

youdao

Methods: Nonrandom purposive sampling was used to select key respondents to conduct indepth interview.

方法：采用非随机、目的抽样方法选择被访者，对关键知情人进行个人深入访谈。

youdao