[多选题]以下关于列车清客描述正确的是（ ）
A.组织列车清客时，列车与车站播放清客广播，车站人员上车引导乘客下车，应在 3min 内完成 清客。
B.若清客开始 2min 后车内仍有乘客滞留，车站应派人经驾驶室进入客室跟车防护，带客折返，待 列车折返完毕后引导滞留乘客下车。退出服务的列车应确认清客完毕，保证车内无乘客滞留。
C.清客完毕 后，车站向司机显示“好了”信号，司机方可关门动车。
D.组织单列载客列车中间站折返时，应避免列车在折返站同站台同时上下客。如组织列车中间 站站前折返时，应在运行终点站前一车站办理清客。

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