日趋严重的肥胖问题(英文)

摘要

正 American kids are fat—and they aregrowing fatter at an alarming rate.Overthe past 20 years,the percentage of over-weight children in America has doubled.Among teens it has tripled.The U.S.Cen-ters for Disease Control and Preventionreports that 15 percent of American chil-