首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   15942篇
  免费   993篇
  国内免费   81篇
耳鼻咽喉   111篇
儿科学   352篇
妇产科学   400篇
基础医学   2321篇
口腔科学   641篇
临床医学   1395篇
内科学   3194篇
皮肤病学   274篇
神经病学   1761篇
特种医学   468篇
外科学   2077篇
综合类   63篇
现状与发展   1篇
一般理论   9篇
预防医学   1349篇
眼科学   188篇
药学   1052篇
中国医学   71篇
肿瘤学   1289篇
  2023年   141篇
  2022年   241篇
  2021年   536篇
  2020年   337篇
  2019年   502篇
  2018年   566篇
  2017年   433篇
  2016年   480篇
  2015年   485篇
  2014年   610篇
  2013年   837篇
  2012年   1175篇
  2011年   1152篇
  2010年   673篇
  2009年   563篇
  2008年   976篇
  2007年   940篇
  2006年   907篇
  2005年   847篇
  2004年   793篇
  2003年   706篇
  2002年   590篇
  2001年   241篇
  2000年   235篇
  1999年   260篇
  1998年   103篇
  1997年   108篇
  1996年   73篇
  1995年   58篇
  1994年   71篇
  1993年   48篇
  1992年   137篇
  1991年   149篇
  1990年   115篇
  1989年   132篇
  1988年   111篇
  1987年   108篇
  1986年   78篇
  1985年   81篇
  1984年   53篇
  1983年   33篇
  1982年   32篇
  1981年   18篇
  1980年   21篇
  1979年   36篇
  1978年   19篇
  1977年   29篇
  1976年   17篇
  1974年   35篇
  1973年   21篇
排序方式: 共有10000条查询结果,搜索用时 250 毫秒
1.
2.
3.
4.
5.
6.
Although classified by the Joint Monitoring Programme (JMP) as unimproved sanitation facilities, public toilets still play a critical role in eliminating open defecation in informal settlements. We explored perspectives of toilet operators on opportunities and barriers to operation and maintenance (O&M) of public toilets in informal settlements. A cross-sectional study design was used. Up to 20 in-depth interviews were used to obtain data on the experiences of public toilet operators. Thematic content analysis was used.

Ressults show that opportunities for improving O&M include; operation of public toilets is a source of livelihood; operators are knowledgeable on occupational risks, and the community is involvedin sanitation activities. Barriers to effective O&M include; high operation costs, failure to break even and a lack of investments in occupational health Therefore, there is need to recognise the significance of public toilets as a viable alternative to open defecation in areas where ownership of private sanitation facilities is difficult. Failure to observe the health and safety of toilet operators may further compromise O&M.  相似文献   

7.
8.
9.
IntroductionThis article deals with the occurrence of health problems due to gunshot wounds to the face among military police officers, in the metropolitan region of Rio de Janeiro, who were submitted to surgery at the Oral and Maxillofacial Surgery and Traumatology Clinic of Hospital Central da Polícia Militar.ObjectiveTo identify the profile of patients submitted to surgery as a result of gunshot wounds, the anatomical distribution of maxillofacial fractures, the identified sequelae and complications, the health specialties involved in the rehabilitation of these patients, and to discuss the social, emotional and work performance-related effects of work among these subjects.MethodsA retrospective epidemiological study was carried out based on secondary data from military police officers who were submitted to surgery at Hospital Central da Polícia Militar due to gunshot wounds from June 2003 to December 2017.ResultsDuring the study period, 778 surgeries were performed in the operating room by the Oral and Maxillofacial Surgery and Traumatology service at Hospital Central da Polícia Militar, 186 of which were due to gunshot wounds (23.9%). All patients were males and the mean age 34.7 years. Bone segment loss was the most common sequela. Facial esthetic impairment and reports of insomnia were the most often identified late consequences of impact on health and social life. Regarding the occupational impacts of the sustained injury, the mean time away from work due to medical leave for the treatment of maxillofacial injuries was 11.7 months.ConclusionThe treatment of gunshot wounds patients with facial injuries requires multiple surgical interventions and their rehabilitation requires the involvement of different health specialties. Further studies are needed to qualitatively analyze the impact of this type of facial trauma on the patients' lives and their social consequences.  相似文献   
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号