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近20年来,随着经济的发展、人民生活水平的不断提高,由于过度营养以及快节奏的生活方式,各种与之相关疾病的发病率逐年增高。如我国在1991～1992年曾进行了3次
In recent 20 years, with the economic development, people’s living standards have been continuously improved. Due to over-nutrition and fast-paced lifestyles, the incidence of various related diseases has been increasing year by year. As our country in 1991 ~ 1992 has been carried out 3 times