说明：  通过密码登录后，可以对活动场所进行管理和查询，管理主要是增加，删除，查询活动，通过此系统可以对公共活动场所进行有效管理，从而避免活动发生冲突。
(Password venue management and query management is to increase, delete, query the activities of this system for effective management of public places, in order to avoid conflict.)