—— 请按键盘 空白键 开始游戏 ——

The best way to learn mathematics is to do mathematics.
The unexamined life is not worth living.
The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.
你可以痴迷于服务你的客户/读者/客户,你也可以痴迷于击败竞争对手。两者都有效,但前者会让你走得更远。
一本书就是你手中握着的梦想。