结果：高频组准确率与低频组相近（P>0 .0 5 ） ，高、低频联合检查组确诊率高于低频组（P<0 .0 5 ）。
Results:Compared to the low frequency group, the diagnosis accuracy rate of high frequency group is nearly P >0 05 and the diagnosis accuracy was raised in high low frequency group.
方法行大肠镜检查的900例患者随机分为电子肠镜常规检查组（A组）和电子肠镜联合染色检查组（B）。
Methods 900 patients undergoing routine colonoscopy were randomized to conventional colonoscopy A group a dye-spray B group(0.3% indigo carmine used to coat the entire colon).
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