说明：  关于蒙特卡罗方法介绍的很完整的PPt文档，是英文版的，对学习的人很有帮助，有助于进一步理解该方法的内涵，文档编写的很精致。
(Monte Carlo method on a very complete introduction PPT documents, it is in English, were helpful in learning, contribute to a better understanding of the connotation of the method, the document prepared by a very refined.)