—— 请按键盘 空白键 开始游戏 ——

The worth of a state, in the long run, is the worth of the individuals composing it.
内心守静而不生差错,不让外物扰乱五官,不让五官扰乱内心,这就叫做心中有所得。
The most effective debugging tool is still careful thought, coupled with judiciously placed print statements.