随机评估可以帮助我们了解发展中哪些措施有效，哪些无效。
Randomized evaluations can help us understand what works and what doesn't in development.
每天我都发现越来越多的美好事物，这足以让人疯狂。
A people without poetry is like a night without stars.
"I'm drawn to stories that have a kind of moral ambiguity, where the lines between right and wrong are blurred."