Babies who are breast-fed may be more likely to be successful in life, a new study published Tuesday suggests. The study followe

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问题     Babies who are breast-fed may be more likely to be successful in life, a new study published Tuesday suggests. The study followed more than 3,000 babies into adulthood in Brazil. The researchers found those who were breast-fed scored slightly higher in intelligence tests in their 30 s, stayed in school longer and earned more money than those who were given formula(配方奶粉).
    "Breast-feeding not only has short-term benefits, but also breast-feeding has long-term benefits ," says Bernardo Lessa Horta of the Federal University of Pelotas in Brazil, who led the study being published in the Lancet Global Health.
     (76) Doctors have long known that breast-feeding can be good for a baby’s health. This is especially true in poor countries, where water can be contaminated. For instance, a baby given formula in developing countries is 14 times more likely to die in the first six months than one who’s breast-fed. In the U. S. , some research has suggested that breast-feeding may raise a baby’s IQ(智商)by a few points. But a recent study with siblings (兄弟姊妹) found little advantage to breast-feeding.
    Horta says these previous studies didn’t follow children into adulthood to see if breast-feeding had long-term effects. So Horta analyzed data collected from 3,493 volunteers he and his colleagues have been following since birth. They are now in their 30s. First, the researchers gave the subjects IQ tests. Those who were breast-fed for 12 months or more had IQ test scores that were 3.76 points higher than those who were breast-fed for less than one month, the team found.
    When Horta and his colleagues looked at how much education the subjects had gotten and how much money they were making, they also found a clear difference: Those who were breast-fed stayed the longer in school for about an extra year and had monthly salaries that were about a third higher.
Which of the following is TRUE?

选项 A、Doctors don’t understand the benefits of breast-feeding.
B、Horta is concerned with water contamination in poor countries.
C、Horta’s research project lasted about 30 years.
D、Breast-feeding is the only way to improve a baby’s health.

答案C

解析 细节理解题。题干问的是“下列哪一个选项是正确的?”根据定位句“所以奥尔塔分析3493名志愿者,他和他的同事们一直在收集他们出生以来的数据。他们现在是30岁。”C项说:“他的项目持续了大约有30年之久”。故选C项。根据第三段第一句“Doctorshave long known that breast—feeding can be good for a baby’s health.”,故A项错误。B项扭曲文章意思,文章第三段第二句:“This is especially true in poor countries,where water can becontaminated.”故排除B项。D项文中未提及。故选C。
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