题目内容：

阅读下面材料，在空白处填入适当的内容(1个单词）或括号内单词的正确形式。

New research says nuts could be a  1.(value), tasty and nutritious slimming aid. Researchers from Harvard University recommended that people replace a daily unhealthy snack with a small handful of nuts 2.(slow) down weight gain. This is 3.(especial) helpful for people as they get older. The researchers found that people who ate just 14g of nuts every day gained less weight 4.those who ate another snack. The people who ate the nuts were less likely to become obese (肥胖的). However, the benefits to our weight could be quite small. 5.(eat) nuts instead of chocolate and cakes could help prevent a weight gain of just 0.4 to 0.7kg over four years.

The researchers conducted a long-term study in which they looked at 6.lifestyle of nearly 190,000 people for over two 7.(decade). The participants in the research 8.(divide) into three groups. They included more than 51,000 male health professionals aged 40 to 75, 121,700 nurses aged 35 to 55 and 16,686 nurses aged 24 to 44. Researchers asked the participants questions every four years about 9.(they) weight, how often they ate nuts, and how often they exercised. A researcher said replacing less healthy foods with nuts might help reduce the weight gain 10. is common as we age, and might lower the chances of becoming obese.