text_1: 共有 30% 的 患者 患 Ⅳ 期 疾病 , 大多数 患者 由于 完全 的 肿瘤 细胞 减灭术 或者 一线 治疗 后 达到 完全缓解 , 因而 无 病变 证据 .
  
text_2: a total of 30 % of the patients had stage IV disease , and most patients had no evidence of disease owing to complete cytoreduction or were having a complete response after first @-@ line treatment .
  