"Randomized experiments are the gold standard for causal inference, but they are not always feasible."

To be modern is to be in constant dialogue with tradition.

The greatest leader is not necessarily the one who does the greatest things. He is the one that gets the people to do the greatest things.

我不是那种会让对时刻的爱减少的人。

Education is the key to unlock the golden door of freedom.

生活是世界上最罕见的事情。大多数人只是存在，仅此而已。

冒险只是麻烦的浪漫名字。