ประโยคภาษาจีน : 中文句子 |
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fāng fǎ 方法 yòng 用 suí jī 随机 chōu yàng 抽样 fāng fǎ 方法 chōu qǔ 抽取 kāi fēng shì 开封市 suì 岁 yǐ shàng 以上 shè qū 社区 jiàn kāng 健康 jū mín 居民 rén 人 jìn xíng 进行 wèn juǎn diào chá 问卷调查 bìng 并 jiǎn cè 检测 xuè zhī 血脂 shuǐ píng 水平 |
Methods: 2734 residents who were over 20 years old were sampled by random sampling method, and were investigated by questionnaire and their blood fat were detected at the same time. |