—— 请按键盘 空白键 开始游戏 ——

The key to solving complex problems is often to find the right abstraction that simplifies the problem without losing its essential features.
防止战争最可靠的方法是不惧怕战争。
The challenge is not just to give people money but to understand how they make decisions under constraints.
护理是关于关心人,而不仅仅是治疗疾病。