世界上充满了显而易见的事物，却没有人去观察。
Life is a series of missed connections and unanswered questions.
The world is a better place with your art in it.
理解布莱克-斯科尔斯模型的关键在于认识到它是基于风险中性世界的概念，在这个世界中投资者对风险漠不关心。