本文试图以城市贫困群体的年龄分布特征为切入点，指出贫困群体向中年积聚的现象。
The starting point of my thesis is the analysis of age distribution on the urban poverty groups and I found that the poor has the inclination to concentrate on the middle age or old-age populations.
目的探讨动脉粥样硬化性缺血性脑血管病患者颅内外动脉狭窄的部位和年龄分布特征。
Objective To explore the distribution of cerebral artery stenosis in patients with ischemic cerebrovascular disease.
目的：探讨糖尿病冠心病本虚标实证型分布特征及其与病程、年龄的关系。
Objective: To probe the relationship between syndrome distribution character and course of diseases and age in diabetic coronary heart disease.
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