R语言怎么做全部变量都是二分类变量的中介效应https://zhuanlan.zhihu.com/p/517590570%E6%88%91%E5%9C%A8%E5%85%B6%E4%BB%96%E7%BD%91%E7%AB%99%E4%B8%8A%E6%89%BE%E5%88%B0%E7%9A%84%E7%9B%B8%E5%85%B3%E4%B8%9C%E8%A5%BF%EF%BC%8C%E4%BD%86%E6%98%AF%E4%BB%96%E7%9A%84%E8%87%AA%E5%8F%98%E9%87%8F%E5%92%8C%E5%9B%A0%E5%8F%98%E9%87%8F%E6%98%AF%E8%BF%9E%E7%BB%AD%E5%8F%98%E9%87%8F
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