The key to credible causal inference is not just the method, but how well the method fits the question at hand.
我爱做女人,我爱做朋友,我爱做女儿,我爱做妈妈
你无法改变过去,但你可以塑造未来。
我从未输过比赛,只是时间不够了。
The only limit to our realization of tomorrow is our doubts of today.