閱讀下面短文，請根據(jù)短文后的要求答題。(請注意問題后的字數(shù)要求)

　　[1]Losing weight is hard enough．Keeping it off is even harder．Now a new study by researchers at Penn State suggests that the techniques that work for losing weight aren't necessarily the same as those that help keep you slim．

　　[2]First the researchers surveyed over 1, 100 people who had achieved significant weight loss and maintained(維持)it．The researchers identified 36 weight－loss and weight－maintenance practices that at least10％ of the group used．

　　[3]Then the researchers conducted a national telephone survey of overweight people who had tried to lose weight and keep it off with varying success： about 11％reported successfully losing weight, and 21％ were able to maintain that loss for at least a year．

　　[4]The survey found people who ________ did so by participating in weight loss programs, cutting back on sugar, eating healthy snacks, not skipping meals and participating in different types of exercise．

　　[5]Still．Say many nutrition and obesity experts．The basic principles of weight loss and maintenance are the same; you have to eat a healthy diet and increase your exercise．people who lose weight and keep it off tend to eat significantly healthier foods and do a lot more exercise than the average American．

　　[6]But what may maintain between weight－loss and maintenance is a person's attitude; rather than focusing on actively losing weight in the short term．People have to start focusing on long－term, permanent lifestyle changes and behaviors, if they want to maintain the weight that's been lost．The key to success, experts agree, is motivation, not necessarily the particulars of your weight－loss program．

1．How does the author introduce the topic of the text?(no more than 8words)

________________

2．Fill in the blank in Paragraph4 with proper words．(no more than 5 words)

________________

3．What is the most important about keeping weight off successfully according to the experts?(no more than 3 words)

________________

4．What do experts say about weight loss and maintenance?(no more than 10 words)

________________

5．What is the main idea of the text?(no more t han 8 words)

________________

答案：
解析：

　　1．By providing a new study．

　　2．lost weight successfully．本句意為：研究結(jié)果顯示，那些減肥成功是采用與減重有關(guān)的方法來達到成果的。

　　3．Permanent motivation．從最后一段最后一句“在專家們看來，成功的關(guān)鍵是保持動力，這不僅僅是在你的減肥計劃中的某一部分，應該是貫穿始終的�！� 可知。

　　4．You should eat a healthy diet and increase your exercise．根據(jù)第五段“你必須養(yǎng)成健康飲食的習慣，同時增加體育運動。能夠在減肥之后有效的保持成果的人們通常在飲食方面非常的健康，并且要比普通人更加多的參與運動�！� 可知。

　　5．How to keep the weight off．第一段的第二句Keeping it off is even harder．(那么保持住減肥的成果不反彈則是難上加難。)是主旨所在。


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