—— 请按键盘 空白键 开始游戏 ——

"Randomized experiments are the gold standard for causal inference, but they are not always feasible."
I'm not a human being, I'm a martian.
The goal of computing is insight, not numbers.
正义意味着关心自己的事情,而不是干预别人的事务。
La única derrota es no haber intentado.