[填空题]The U.S. government is asking Americans to eat less and exercise more in an effort to stem the country’s increasing epidemic of obesity. It has issued revised dietary recommendations that emphasize proper nutrition, more physical activity, and personal initiative in maintaining a healthy weight.
U.S. law requires the government to revise its dietary guidelines every five years to keep up with the latest scientific research. Agriculture Secretary Ann Veneman, whose agency is responsible for promoting healthy nutrition, says this year’s update is an effort to reverse a situation where two-thirds of Americans are too heavy. The new dietary guidelines are part of the ongoing effort to help Americans adopt and keep healthier lifestyles and to address the epidemic of overweight and obesity that is affecting so many, especially our nation’s children.
Secretary Veneman acknowledges that the food recommendations have not changed much over the years. They still call for diets rich

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