Causal inference is not just about statistical significance; it's about understanding the mechanisms behind the numbers.

"The most dangerous stories are those that are true."

【讲解】：有志之士和仁人，不会贪生怕死而损害仁，只会勇于牺牲来成全仁。

在每一本书中，都有作者灵魂的一部分。