据１９９７年癌情公布，我国癌症的病死率已由７０年代占总死亡率的１１７％上升到９０年代的１８１４％，其中胃癌居１０种恶性肿瘤之首。由于病因尚未完全清楚，实施针对病因的一级预防非常困难；众多研究资料表明，胃粘膜细胞在发展成癌细胞之前往往经历胃癌癌前病... According to the announcement of cancer in 1997, the mortality rate of cancer in China has increased from 11.7% of the total mortality rate in the 1970s to 18% of the total in the 1990s. Of these, gastric cancer ranks first among 10 malignant tumors. Because the etiology is not yet fully understood, it is very difficult to implement primary prevention for the cause; numerous studies have shown that gastric mucosal cells often experience precancerous gastric cancer before they develop into cancer cells...