自我防御机制的功能是 （）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29334' and id < 2388493 and id<>'2388493' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29334' and id > 2388493 and id<>'2388493' order by id asc limit 5