text_1: 随之而来 的 是 略低 的 晚期 癌 发生率 , 但 检出 的 此类 癌症 数量 较 少 , 而 晚期 癌 数量 减少 在 完成 数年 随访 之前 预计 不会 出现 23 , 24 .
  
text_2: this finding was accompanied by a slightly lower rate of late @-@ stage cancers , but the number of such cancers that were detected was small , and a decrease in the number of late @-@ stage cancers was not expected until after several years of follow @-@ up.23,24
  