Group A: intravenous infusion of paclitaxel (albumin binding) 260 mg/m2, intravenous infusion, carboplatin area under curve （AUC) = 6, intravenous infusion, starting from randomization, once every 3 weeks, for 4-6 cycles,or progression, or intolerance, or deth or start a new anti-tumor treatment, whichever occurs first.