女，60岁，排便习惯改变半年，大便次数增多， 有时带脓性黏液，偶尔混有血液，便后不适。确诊依靠的检查是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32550' and id < 2586643 and id<>'2586643' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32550' and id > 2586643 and id<>'2586643' order by id asc limit 5