text_1: 乳腺 组织 极 致密 的 女性 患 乳腺癌 的 风险 增加 , 而且 乳腺 X 线 检查 检出 其 乳腺癌 的 可能性 也 较 小 1 - 3 .
  
text_2: women with extremely dense breast tissue have an increased risk of breast cancer , and their cancers are also less likely to be detected on mammography.1 @-@ 3
  