当随机化不可行时，匹配方法可以是一个强大的工具。

解释：看见美丽的容貌就心悦，是人之常情。

In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed.

真相既简单又复杂。

Innovation is not just about creating new products; it's about rethinking how we solve problems.

人生在世，贵在勤劳。勤劳就不会贫乏。

书本身不是目的，它是一种唤起的手段。