The Safety and Efficacy of Neoadjuvant Immunochemotherapy Followed by Laparoscopic Gastrectomy for Gastric Cancer

"Drug: Sintilimab, Nivolumab, and Camrelizumab，One course will last 21 days.Given once every 3 weeks at a dose of 200 mg. Drug: nab-paclitaxel nab-paclitaxel one course will last 21 days#Given twice every 3 weeks at a dose of 125 mg/m2. Drug:oxaliplatin Oxaliplatin one course will last 21 days#Given once every 3 weeks at a dose of 130 mg/m2.~Drug:docetaxel docetaxel one course will last 21 days#Given once every 3 weeks at a dose of 40mg/m2.~Drug:fluorouracil fluorouracil one course will last 14 days#Given once every 2 weeks at a dose of 2800mg/m2.~Drug: Capecitabine Capecitabine was calculated according to body surface area every 3 weeks at a dose of 1000 mg/m2, P.O., bid, d1-d14 Drug: S1 S-1 was calculated according to body surface area, P.O., bid, d1-d14#And the dosage according body surface area:\<1.25m2, 40mg everytime;1.25-1.5m2,50mg every time; \>1.5m2, 60mg every time"