1·Methods Retrospective survey was conducted in 636 workers.
方法对636名接触工人作了回顾性调查。
2·METHODS The cases of puerperal hospital infection in recent 5 years were analyzed by retrospective survey.
方法采用回顾性调查方法对5年医院分娩产妇医院感染发生情况进行统计分析。
3·A retrospective survey of the deaths caused by malignant tumor in 11 years was carried out at the Beijing Coking and Chemical Works.
我们对北京焦化厂2,106人进行了恶性肿瘤死亡十一年回顾性调查。
4·METHODS The main problems were found out by retrospective survey method, and could be solved through establishing a system of management.
方法采用回顾性总结的方法，找出问题，提出相应对策。
5·Methods Retrospective survey and descriptive research analysis were made with annuals reports of infections diseases during 1984 and 2003 in Baoan District.
方法利用宝安区1984 ~ 2003年疫情汇编和宝安区统计局历年人口年鉴进行回顾性调查，并作描述性研究分析。
6·Methods: Using the methods of retrospective survey study, 270 senile patients who had intact clinical data during 1987-1998 for the first implantment were analysed.
方法：将1987～1998年间270例首次入院植入心脏起搏器的临床资料进行回顾性分析。
7·Methods: Causes of diseases and death in hospitalized military pilots in a certain region during 45 years were investigated and analysed with a retrospective survey.
方法：采用回顾性调查方法对某地区45 年间住院军事飞行人员病伤死亡病例进行分析。
8·Objective A retrospective survey of 187 patients who underwent canal down mastoidectomy was performed in order to improve the outcome of the operation , emphasizing on otorrhea.
目的通过对187例开放式乳突手术后耳漏的情况进行回顾性分析，以提高开放式乳突手术的治疗效果。
9·To probe the correlation between forensic clinical medicine and radiology, a retrospective survey was conducted on 400 cases of living body appraisal about some radiologic issues.
为探讨法医临床学鉴定与放射学的关系，本文对400例活体鉴定就放射学检查的有关问题进行回顾性研究。
10·Method Randomly selected 200 patients discharged from orthopedic trauma surgery. To do a retrospective survey of the application of antimicrobial, collate, analyze then access to information.
方法随机抽取我院创伤骨科手术患者出院病例200份，对抗菌药物应用情况作回顾性调查，整理，分析获得资料。