论文部分内容阅读
据世界卫生组织（WHO）报告，1997年全球癌症死亡数约620余万，居全球人类主要死因第三位。我国近期的调查也表明，肿瘤死亡分别列我国城市和农村居民死因的第一、二位。就全球而言，20世纪后期近20年癌症的发病数一直是呈逐年上升之势。1990年全球癌症新病例数约807万，比1975
According to the World Health Organization (WHO) report, the number of cancer deaths in the world in 1997 was about 6.2 million, ranking third in the world’s leading causes of death. Recent surveys in China also show that cancer deaths rank first and second in the death causes of urban and rural residents in China. Globally, the number of cancers in the last 20 years of the 20th century has been rising year by year. In 1990, there were about 8.07 million new cases of cancer worldwide, compared with 1975.