Neoadjuvant Chemoradiation With Bevacizumab for Chinese Rectal Cancer Patients

Bevacizumab 5mg/m2 D1,D15,D29,D43;

Oxaliplatin 85mg/m2 D1,D57; Oxaliplatin 85mg/m2 biweekly \* 6 doses 3-4 weeks after radical resection

5-FU 2800mg/m2 civ 48 hours D1,D57; 5-FU 2800mg/m2 civ 48 hours biweekly\*6 doses 3-4 weeks after radical resection; 5-FU 200mg/m2/day civ D15-19,D22-26,D29-33,D36-40,D43-47;

2GY daily \*20次