留存收益成本为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25256' and id < 2138350 and id<>'2138350' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25256' and id > 2138350 and id<>'2138350' order by id asc limit 5