虽然从动物实验研究中发现高钙和维生素D的摄取对于结直肠癌有保护作用，但流行病学方面的研究并没有得出确定的结果。（JoulnaoftheNallorlalCancerInstitute）IM年第88卷第19期报道，为研究钙、维生素D的摄入量与发生结直肠癌的关系，Mhr．＿等人进行了一项前瞻性调查。对象 Although animal studies have shown that high calcium and vitamin D intake have protective effects on colorectal cancer, epidemiological studies have not yielded definitive results. (JoulnaoftheNallorlalCancerInstitute) IM 88/19th report, in order to study the relationship between the intake of calcium and vitamin D and the occurrence of colorectal cancer, Mhr. _ and others conducted a forward-looking survey. Objects