高频闭锁保护，保护停信需带一短延时，这是为了（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69378' and id < 4491446 and id<>'4491446' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69378' and id > 4491446 and id<>'4491446' order by id asc limit 5