"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。
The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.
如果他们恨，就让他们恨吧，看着钱越堆越高。
If you want to grow, you must be willing to adapt.
"The past is a ghost that refuses to leave."
Innovation distinguishes between a leader and a follower.
One is not born, but rather becomes, a woman.