我县曾在1975年初在省肿瘤防办指导下进行1972～74年恶性肿瘤死亡回顾调查从1978年起,全县建立了居民病伤死亡原因报告制度。自1982年以来,其中资料比较完整的为32个乡(镇)。该32个乡(镇)比较均匀地分布于县内半山、平原、沙地三种不同地形中,乡(镇)数和人口数约占全县67个乡(镇)和一百余万人口的半数。现将1982 In 1975, the county conducted a retrospective survey of the death of malignant tumors from 1972 to 74 under the guidance of the Provincial Cancer Prevention Office. Since 1978, the county established a report system for the cause of death of residents. Since 1982, there are 32 townships (towns) with relatively complete information. The 32 townships (towns) are more evenly distributed in three different terrains: half-mountain, plain, and sandy land. The number of townships (towns) and population accounts for about 67 townships (towns) and one million people in the county. Half of the number. Now 1982