Many college-bound freshmen are worrying about more than just who their roommates will be this fall.
They may also be nervous about the well-known fact that'they are likely to gain weight this school year.
While many of us remember the extra weight that showed up right around the start of our college careers,
we are not always clear on how much weight we realize gained or why.
     Many nutrition experts and psychologists think that it is the change in environment and the stress of a
new begjnning that cause the typical college freshmen to gain extra pounds. As students start a new stage
of their lives, many eat to deal with the stress of change or loneliness. Often, college students are making
meals or choosing foods independently for the first time in their lives. If they live in the college dormitory,
they have a wide variety of foods to select from that may be higher in calories and fatter than the foods they
consumed living at home. In addition college social events usually center around food. I clearly remember
sitting in my dorm cafeteria for two or three hours on a Saturday morning socializing with my new friends.
Instead of eating only one meal, we would start with breakfast, eat throughout the duration of our socializing,
and finish with lunch. Food also makes an appearance after late-night parties, as part of a school day, or
simply to break the monotony (单调).
     So will this year's typical freshmen really gain 15 pounds? According to a 2006 Tufts University study,
students enrolling in college this fall will gain weight, but maybe not the assumed 15 pounds. Based on the
students surveyed, the study found that men can expect to gain an average of 6 pounds and women an
average of 4.5 pounds during the freshman year.

1. What makes many college-bound freshman worried? (not more than 8 words)
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2. What seems to play an important role in students' social events? (1 word)
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3. What causes many college freshmen gain weight according to many nutrition experts and psychologists?
    (not more than 11 words)
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4. What is the result of the 2006 Tufts University study? (not more than 11 words)
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