根据罗马Ⅲ的诊断标准，功能性消化不良患者症状的持续时间应该满足（  ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32056' and id < 2559855 and id<>'2559855' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32056' and id > 2559855 and id<>'2559855' order by id asc limit 5