—— 请按键盘 空白键 开始游戏 ——

The most effective debugging tool is still careful thought, coupled with judiciously placed print statements.
解释:向外物游览就要要求外物的完备,向自己内心求取,则能充实完善自身。
计算机科学创新的关键不仅仅是技术技能,而是创造性思维。