—— 请按键盘 空白键 开始游戏 ——

It has always been easy to hate and destroy. To build and to cherish is much more difficult.
The best science often comes from asking the simplest questions.
宏观经济学的核心问题是理解人们如何随时间做出决策。
星星会褪色,太阳会因年老而变暗,自然会在岁月中沉沦;但你将在不朽的青春中繁荣。