"Matching methods can be a powerful tool when randomization is not possible."
当随机化不可行时,匹配方法可以是一个强大的工具。
It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity, it was the season of Light, it was the season of Darkness, it was the spring of hope, it was the winter of despair, we had everything before us, we had nothing before us, we were all going direct to Heaven, we were all doing direct the other way.
大自然将人类置于两位至高无上的主宰之下,痛苦和快乐。
唯一受过教育的人是学会了如何学习和改变的人。
That I exist is a pertetual surprise which is life.
挡在你和目标之间的唯一东西是你不断告诉自己为什么无法实现它的故事。
I cannot teach anybody anything。I can only make them think.
创新不仅仅是技术的问题;它关乎改变思维方式,拥抱新的思考方法。