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为了长寿,人们在从事各种社会活动时,必须跟各种疾病与危害进行斗争。如在壮年期就有感染性疾病、体质性疾病和老年期的恶性肿瘤、脑血管异常,心脏病等。这些疾病均与复杂的遗传因素和变化的环境条件有关,一般单纯受某一因素影响的却很少。例如心肌梗塞在发病因素中,血压值的遗传力(遗传力=遗传率)约占0.5,血糖值为0.5,尿酸值占0.3,胆
In order to live longer, people must struggle with various diseases and harms when engaging in various social activities. As in the prime of life there are infectious diseases, physical diseases and senile malignancies, cerebrovascular abnormalities, heart disease. These diseases are associated with complex genetic factors and changing environmental conditions, but generally only a few factors. For example, in the incidence of myocardial infarction factors, the heritability of blood pressure (heritability = heritability) of about 0.5, blood glucose 0.5, uric acid 0.3, gall