这个结构一般用于数据库的索引，综合效率非常高，像 Berkerly DB , sqlite , mysql 数据库都使用了这个算法处理索引。

如果想自己做个小型数据库，可能参考一下这个算法的实现，可能会对你有所帮助。 -This structure is generally used to index the database, the overall efficiency is very high, like Berkerly DB, sqlite, mysql databases are indexed using this algorithm processing. If you want yourself to be a small database, you may refer to this algorithm, it may be helpful to you.