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 boost a baby's IQ（智商）by a few points. But a recent study with siblings（兄弟姐妹）found little advantage to breast-feeding.

詞匯積累：

be good for 對……有好處

especially adv.特別地（副詞，可修飾形容詞或動詞）

contaminate v.弄臟，污染

for instance 比如

formula n.配方（文中指非母乳喂養）

be likely to 傾向于，容易

suggest v.建議（常用動詞）

boost v.提高

長句分析：

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.

主語a baby，謂語is likely to

句子中存在一個比較關系，a baby given formula非母乳喂養與one who's breast-fed母乳喂養

大意：比如，在前六個月，發展中國家非母乳喂養嬰兒的死亡率是母乳喂養的14倍。

常考考點分析：

In the U.S., some research has suggested that breast-feeding may boost a baby's IQ（智商）by a few points. But a recent study with siblings（兄弟姐妹） found little advantage to breast-feeding.

在閱讀理解題中，關聯詞是關鍵，尤其這里出現but，是一個明顯的轉折，第一句breast-feeding may boost a baby's IQ（智商）母乳喂養可能提高智商，第二句轉折，found little advantage to breast-feeding母乳喂養在（提高智商方面）并沒有什么優勢。第二句是答題的關鍵。