The Advantages and Disadvantages Between Uncut Roux-en-Y Reconstruction and Billroth II Reconstruction After Laparoscopy-assisted Distal Gastrectomy for Gastric

Inclusion Criteria: * Clinical diagnosis of distal gastric cancer * underwent laparoscopy-assisted distal gastrectomy Exclusion Criteria: * have simultaneously other cancer * have severe systemic inflammatory disease ,serious illness such as diabetes, chronic lung diseases * have upper gastrointestinal surgery * can't bear the gastric tube * the period is too late or the tumor is too large to carry on a laparoscopy assisted radical distal gastrectomy