【单选题】The preorder traversal sequence of a binary tree is abdgcefh, the inorder traversal sequence of a binary tree is dgbaechf, the postorder traversal sequence of a binary tree is ____.
【单选题】男性,25岁。病人主诉右下腹剧烈疼痛,腹痛开始于脐周,然后转移至右下腹。体检示:体温39.1°C,脉搏113次/分钟,血 120/85mmHg右下腹压痛、肌紧张、反跳痛、肠鸣音减弱;腰大肌试验阳性。实验室检查:WBC12.5 X 109/L,中性粒细胞比例0.82。 6.若该病人行手术治疗后,为预瞎术后肠粘连的最关键措施为