A Clinical Study of the Effects of Modified BII+Braun on Quality of Life After for Distal Gastric Cancer

Inclusion Criteria: * 18\<age\<75 * Gastric lesions were diagnosed as gastric adenocarcinoma by endoscopic biopsy * The preoperative clinical stage is T1-4a,N0-3,M0(According to AJCC- 7th TNM tumor stage) * It is expected that the results of R0 surgery can be obtained by performing distal gastrectomy and D2 lymph node dissection * Preoperative ECOG performance status score 0/1 * Nutrition risk screening（NRS2002） * Preoperative ASA score I-III * Patient informed consent Exclusion Criteria: * Pregnancy or breastfeeding women * Severe mental illness * History of upper abdominal surgery * History of gastric surgery (including ESD/EMR for gastric cancer) * 3 years of history of other malignant diseases； * Gastric cancer patients who have undergone neoadjuvant treatment or recommend neoadjuvant treatment * A history of unstable angina or myocardial infarction within 6 months * History of cerebral infarction or cerebral hemorrhage within 6 months * There is a history of sustained systemic corticosteroid treatment within 1 month * Needs simultaneous surgical treatment of other diseases； * Gastric cancer complications (bleeding, perforation, obstruction) require emergency surgery * Pulmonary function test FEV\<1 predicted value 50%