对通讯录进行分组（比如家人、朋友、同事、重要人士等）；

能够根据姓名对通讯录进行查询，添加，修改以及删除操作。-　　Group of contacts (such as family, friends, colleagues, and other important people)　

Be able to address book under the name of the query, add, modify and delete operations.