—— 请按键盘 空白键 开始游戏 ——

The beauty of instrumental variables is that they allow us to see the world in a new light.
"We are all detectives of our own lives, piecing together clues from the past."
The best way to guarantee a loss is to quit.
不能以牺牲他人自由为代价来获得持久和平。
当你成为中央银行时,你必须考虑那些不可想象的事情。