单选题 Babies are less likely to grow up into fat children if they are fed breast milk exclusively, which provides powerful ammunition fi3r the campaign to encourage mothers to choose the breast over the bottle.
German scientists say their findings are the result of the largest study to date investigating the link between breast-feeding and obesity later in life. The findings suggest breast-feeding could turn out to be a powerful strategy for fighting the spiraling level of childhood obesity. The study, which tracked 9,357 children in Bavaria, found that the longer babies were breast-fed exclusively before being switched to formula or food, the lower their chances of starting school as overweight children.
The German study found that infants given only breast milk until they were 3 to 5 months old were more than a third less likely to be obese by the age of 5 or 6 than babies given only formula from the start. Those breast-fed exclusively for 6 months to a year fared even better -they were 43 percent less likely to be obese. Breast-feeding beyond a child's first birthday was better still, giving babies a 72 percent lower chance of turning out to be obese children.
Even just some breast milk proved to be better than none, according to the study. Children who were breast-fed for only 1:he first month or two of their lives were 10 percent less likely to be obese by the time they entered elementary school.
Besides being more likely to be obese, bottle-fed children also had a greater chance of being simply overweight by elementary school. As with obesity, the risk diminished the longer breast-feeding continued into childhood.
Children were classed as overweight if their body mass index which allows comparison of the girth of people of different heights was in the highest 10 percent of all children their age and sex in IBavaria. They were labeled obese if they were in the highest 3 percent.
The researchers took into account several factors that could have skewed the results, such as eatin.cl habits, socioeconomic class, birth weight, parents' and siblings' ages, how long the children played outside and whether they had their own bedrooms.
In fact, the fatter children were eating less butter, fewer desserts and whole-milk products, and more low-fat dairy foods -probably in an attempt to lose weight.
However, what is not clear from the study is how much of the children's weight problem was due to an inherited tendency to be fat. Experts noted that genetics might be responsible for a small percentage of the cases, but could not be the total explanation. A follow-up study which takes into account parents' weight suggests a genetic disadvantage doesn't seem to make much difference.
But is it something in the breast milk, or something associated with the act of breast-feeding that makes a difference? It's a bit early for us to draw such a conclusion.

单选题 The first paragraph shows that

单选题 The word"ammunition" (line 2, paragraph I) means

单选题 Which of the following factors do the researchers take into account when they study the children?

单选题 What is the author's attitude toward the new finding?

单选题 Which of the following titles best summarizes the text?