因果推断的本质是超越数据，询问如果我们干预会发生什么。
The essence of causal inference is to go beyond the data and ask what would happen if we intervene.
做你自己，其他人已经有人做了。
压力是一种特权。
Innovation is the key to the continued growth and success of the Internet.
仅仅知道善恶是不够的，还必须去实践。
The most important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.