There was 94 primary female breast cancer patients who were cured in tumor hospital of Shanxi from 2004-07 to 2004-12 in case, and 128 healthy people came from countryside, county and town in control.

方法：采用病例对照的研究方法，选择山西省肿瘤医院2004 年7 月到2004 年12 月间收治的的女性乳腺癌原发病例94 例作为病例组，按照频数匹配的方法选择一般人群128 例作为对照。

youdao

But female choice probably is not the primary cause of the traits.

但是，女性的选择或许不是导致这些特征的首要原因。

youdao

The percentage of female doctors taking less lucrative primary care positions fell from 49% in 1999 to 34% in 2008, the researchers found.

研究者发现，从事收入较少的基层医疗岗位的女性数量从1999年的49%下降到了2008年的34%。

youdao

According to the Department for Education and Skills, 15.7% of primary school teachers in England are male - 26, 200 teachers, compared with 141, 000 female primary teachers.

BBC: NEWS | UK | Education | Call for male primary teachers

Department for Education and Skills figures show that in the UK in 2001 there were 27, 400 male and 141, 000 female primary school teachers.

BBC: NEWS | UK | Education | More 'Mr Right' teachers wanted

Gender balance among staff is vital: countries with a higher proportion of female primary teachers are more likely to have higher enrolment rates for girls in secondary schools.

UNESCO: MEDIA SERVICES