—— 请按键盘 空白键 开始游戏 ——

没有什么是确定的,也没有什么是不可能的。
The more one works, the more one discovers.
The key to credible causal inference is not just the method, but how well the method fits the question at hand.
"Sometimes the hardest thing to do is to tell the simplest truth."
Every mathematical problem has a solution; it's just a matter of finding the right perspective.