目的探讨社区老年人心理健康水平及相关影响因素。
Objective:To investigate the mental health of elderly in community.
介绍了PE管示踪线的探测原理和方法及相关影响因素。
The principle, method and relative influence factors of the trace line of PE pipe are introduced.
目的探讨手术治疗腰椎间盘突出症的临床疗效及相关影响因素。
Objective To analyze the effects and factors related to the operation treatment on lumber intervertebral disc prolapse.
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