Non-alcoholic fatty liver disease (NAFLD) is chronic hepatic disease induced bylipid metabolism disorders, characterized with lipid accumulation in liver. Themorbidity of NAFLD increased continusly with the the improvement of people'sliving standards and the changes of the diet. Owing to the high morbidity of nearly15percents in developed area in our country, NAFLD has become a serious public hleathproblem. In addition, as an important element of metabolic syndrome, NAFLD has adeep relationship with obesity...