Nonalcoholic fatty liver disease ( NAFLD) is a kind of chronic liver disease, whose spectrum of the disease includes simple hepar adiposum, steatohepatitis ( NASH), hepatic fibrosis, and cirrhosis. 非乙醇性脂肪性肝病(NAFLD)是一种常见的慢性肝病,其疾病谱包括单纯性脂肪肝、非乙醇性脂肪性肝炎(NASH)、肝纤维化及肝硬化。