"In observational studies, we often have to rely on assumptions that are not directly testable."

当某件事足够重要时，即使胜算不大，你也会去做。

我通常会说心里话，但这年头说出真心话是个错误，容易引起他人误会。

To write is to confront the void.

建筑始于工程结束之处。

故事永远不会完成，只会被放弃。