"Randomized experiments are the gold standard for causal inference, but they are not always feasible."
随机实验是因果推理的黄金标准，但它们并不总是可行的。
The downside of my celebrity is that I cannot go anywhere in the world without being recognised. It is not enough for me to wear dark sunglasses and a wig. The wheelchair gives me away.
我唔系天才，我只系比人努力多啲。
遗忘就是背叛，铭记就是抵抗。
这不总是关于胜利。这是关于学习和变得更好。
