The effect of i-feed tool in accurate enteral nutrition management of colorectal cancer during perioperative period

Interventions: experimental group:accurate enteral nutrition management based on i-feed tool;control group:Routine mission and education evaluation of enteral nutrition Primary outcome(s): Rate of compliance with enteral nutrients;Nutritional indicators: serum albumin (ALB) serum prealbumin (PA) serum transferrin (TF) and BMI;Clinical rehabilitation index: postoperative first anal exhaust time (h) postoperative complication rate Study Design: Parallel