"A book is a door, and every reader walks through it differently."

"Randomized experiments are the gold standard for causal inference, but they are not always feasible."

In no way can sport be considered a luxury object.

We should learn from international leaders while developing our own path.

贪婪的欲望会带来痛苦，舍弃贪欲才能获得真正的快乐。