"Matching methods can be a powerful tool when randomization is not possible."

历史由胜者书写。

预测未来最好的方式就是去创造未来。

"Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful."

The past is a foreign country; they do things differently there.

我不是来竞争的，我是来统治的。