可以将一篇文档拆分为若干个，依据是传入原文档的某个词作为开始，和某个词作为结束。本程序中开始词和结束词均用假设用[]框起来的。-A document can be split into a number, based on the original document is passed as the start of a word, and as the end of a word. The program began with words and end term assumptions we