"In observational studies, we often have to rely on assumptions that are not directly testable."
在观察性研究中，我们常常不得不依赖于无法直接检验的假设。
Now I want to keep it forever, I want to love you the way I do now for the rest of my life.
真正的领导力意味着为了更美好的明天而做出艰难的决定。
你遇到的每个人都在经历一场你看不见的战斗。请善良以待。
不要害怕放弃好的，去追求伟大的。
人类的心灵是一座迷宫，每个故事都是一根引领我们深入其奥秘的线索。
You are the artist of your own life. Don't hand the paintbrush to anyone else.
当我停止相信自己能赢的那一天，就是我停止打网球的那一天。
The more you write, the more you discover what you don’t know.