2型糖尿病是一组以慢性血糖水平增高为特征的代谢性疾病,是由于胰岛素分泌和(或)作用缺陷所引起。我国1970-1980年调查成人糖尿病患病率为1%,1994-1995年患病率为2.5%,1995-1996年患病率为3.2%[1]。估计我国现有糖尿病患者超过4千万,给社会和经济带来沉重负担,是严重威胁人类健 Type 2 diabetes is a group of metabolic diseases characterized by an increase in chronic blood glucose levels due to a deficiency in insulin secretion and / or effect. The prevalence of diabetes mellitus in adults was 1% from 1970 to 1980 in our country, 2.5% in 1994-1995 and 3.2% in 1995-1996 [1]. It is estimated that over 40 million diabetics in our country have a heavy burden on society and the economy, which is a serious threat to human health