主要用于售楼人员的查询、插入功能，使用了轻量级数据库SQLite，能方便快捷的对数据库进行查询、插入、删除等操作，同时也封装有对弹性列表的类，可直接使用。-Mainly used for the query of the sales staff, insertion, use a lightweight database SQLite, convenient query the database, insert, delete and other operations, but also pac