Keywords gasless hand-assisted laparoscopic surgery;Abdominal Wall Lifting;Cholecystectomy;colorectal resection;clinical application;immune function;acute-phase reaction;

• 非气腹腹腔镜;腹壁提升器;胆囊切除术;结直肠癌根治术;临床应用;免疫功能;急性反应期;