After operation , the scores of pain , edema , hematochezia , retention of urine in the 2nd day were all decreased obviously than those in the 1st day in the two groups ( all P < 0.05 ) ; and the scores of pain , edema , hematochezia , retention of urine in the 1st and the 2nd days of the observation group were lower than those in the control group ( all P < 0.05 ) .