Effect of intestinal preparation based on rapid rehabilitation surgery on intestinal barrier function in patients undergoing surgery for gynecological malignant tumors

Interventions: control group:mechanical bowel preparation before surgery;experimental group:non-mechanical bowel preparation before surgery Primary outcome(s): postoperative gastrointestinal function parameters;postoperative gastrointestinal symptoms;plasma concentrations of D-lactate;plasma concentrations of diamine oxidase Study Design: Parallel