—— 请按键盘 空白键 开始游戏 ——

The only thing that matters is what you believe in yourself.
Every challenge is an opportunity to grow stronger and wiser.
The quality of an organization is determined by the quality of its leadership.
真相很少是纯粹的,也从来不是简单的。
"Randomized experiments are the gold standard for causal inference, but they are not always feasible."