—— 请按键盘 空白键 开始游戏 ——

You can't manage what you don't measure, and you can't improve what you don't manage.
你无法管理你不衡量的东西,也无法改进你不管理的东西。
The difference between correlation and causation is not just academic—it can have profound policy implications.
Stay hungry, stay foolish.