"In observational studies, we often have to rely on assumptions that are not directly testable."
Strategy is not about being better at what you do; it's about being different in what you do.
用英语,每个词都可以动词。在我们的编程语言中会是这样吗?
世界是一个混乱和困惑的地方,唯一理解它的方法就是找到自己的道路。
The middle of every successful project looks like a disaster.