求翻译：分析与讨论：对血βHCG的测定和随访以及彩超血流信号观察，对治疗方案的选择和调整有重大指导意义。药物治疗期间或治疗后阴道不出血或出血量很少，也应密切观察血βHCG，即使血βHCG明显降低，甚至接近正常，只要种植部位包块未消失并存在血流信号，仍有大出血的危险，因此对患者应随访至血βHCG正常及包块消失。严格掌握剖宫产指征，降低剖宫产率，术后合理应用抗生素促使子宫切口愈合良好。重视产后避孕指导，加强避孕措施、避免多次人工流产，人工流产时避免过度刮宫，对降低CSP的发生具有重大意义。是什么意思？

Analysis and discussion on blood determination of beta-HCG and follow-up, as well as observation of color Doppler blood flow signal, to treatment selection and adjustment of the programme of major guiding significance. Drug therapy or treatment during vaginal bleeding or bleeding after little also b