患者女，54岁，近2个月来，排便次数增多，排便时有里急后重感，偶有便血，应考虑先做以下哪种检查

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30781' and id < 2478669 and id<>'2478669' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30781' and id > 2478669 and id<>'2478669' order by id asc limit 5