女，40岁。腹泻半年，粪便呈果酱色，有黏液脓血，粪培养（-），直肠指检未扪及肿块，首选的辅助检查是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30507' and id < 2463418 and id<>'2463418' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30507' and id > 2463418 and id<>'2463418' order by id asc limit 5