决定需求的首要因素是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31436' and id < 2520116 and id<>'2520116' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31436' and id > 2520116 and id<>'2520116' order by id asc limit 5