—— 请按键盘 空白键 开始游戏 ——

The study of consciousness must be free from all preconceptions.
教学不是注满一桶水,而是点燃一把火
In the era of data-driven, the biggest waste is the waste of data.
Natural experiments are a powerful tool for understanding causal relationships in the real world.
老百姓可以长久没有财物,但不能一天没有饭吃。