Methods 15 lying-in women were chosen through the method for convenience sampling using the qualitative research.
方法采用质性研究的方法，用便利取样的方法选择15名产妇通过访谈收集资料。
550 and 451 respondents were selected from China and Sri Lanka respectively by utilizing cluster and convenience sampling procedures for both contexts.
中国和斯里兰卡分别有550人和451人应答者参加了此次问卷调查，应答者的选取采用的是群集抽样和便利抽样两种方法。
550 and 451 respondents were selected from China and Sri Lanka respectively by utilizing cluster and convenience sampling procedures for both contexts.
中国和斯里兰卡分别有550人和451人应答者参加了此次问卷调查，应答者的选取采用的是群集抽样和便利抽样两种方法。
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