Quality is remembered long after price is forgotten.
关系模型的力量在于其简单性和通用性。
一个故事不必大声才能被听见。
工具变量的美妙之处在于它们让我们以新的视角看世界。
The creative act is not pure. History evidences it. Sociology extracts it. The writer loses Eden, writes to be read and comes to realize that he is answerable.