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   159822篇
  免费   31603篇
  国内免费   2464篇
耳鼻咽喉   5261篇
儿科学   5566篇
妇产科学   2548篇
基础医学   4370篇
口腔科学   1688篇
临床医学   27625篇
内科学   49331篇
皮肤病学   7520篇
神经病学   15744篇
特种医学   6637篇
外科学   42529篇
综合类   244篇
现状与发展   72篇
预防医学   7263篇
眼科学   3418篇
药学   1486篇
中国医学   18篇
肿瘤学   12569篇
  2024年   693篇
  2023年   4824篇
  2022年   1317篇
  2021年   3254篇
  2020年   6119篇
  2019年   2299篇
  2018年   7585篇
  2017年   7484篇
  2016年   8606篇
  2015年   8592篇
  2014年   15757篇
  2013年   16028篇
  2012年   6144篇
  2011年   6082篇
  2010年   10669篇
  2009年   14545篇
  2008年   6388篇
  2007年   4583篇
  2006年   7082篇
  2005年   4352篇
  2004年   3645篇
  2003年   2537篇
  2002年   2556篇
  2001年   3937篇
  2000年   3095篇
  1999年   3311篇
  1998年   3744篇
  1997年   3540篇
  1996年   3439篇
  1995年   3279篇
  1994年   2007篇
  1993年   1633篇
  1992年   1454篇
  1991年   1476篇
  1990年   1111篇
  1989年   1230篇
  1988年   1065篇
  1987年   895篇
  1986年   928篇
  1985年   747篇
  1984年   589篇
  1983年   551篇
  1982年   550篇
  1981年   434篇
  1980年   388篇
  1979年   322篇
  1978年   342篇
  1977年   409篇
  1975年   288篇
  1972年   311篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
53.
54.
55.
CONTEXT: The physician assistant profession has been moving toward requiring master's degrees for new practitioners, but some argue this could change the face of the discipline. PURPOSE: To see if there is an association between physician assistants' academic degrees and practice in primary care, in rural areas, and with the medically underserved. METHODS: Surveys were sent to 880 graduates of the first 32 University of Washington physician assistant classes through 2000. Respondents noted their academic degree at program entry and the highest degree attained at any time up to the time of survey. Relationships between practice characteristics and academic degree levels were tested by unadjusted odds ratios and logistic regression after controlling for year of graduation and sex. RESULTS: Of the 478 respondents, 54% worked in primary care, about 30% practiced in nonmetropolitan communities, and 42% reported providing care for the medically underserved. Respondents with no degree (33% of total at entry, 24% at survey) were significantly more likely than degree holders to work in primary care and nonmetropolitan areas. Respondents with no degree at program entry were significantly more likely, and those with no degree at the time of the survey were marginally more likely, to self-report work with the medically underserved. CONCLUSION: Respondents with no academic degree are significantly more likely to demonstrate a commitment to primary, rural, and underserved health care. These findings may inform the national debate about the impact of required advanced degrees on the practice patterns of nonphysician providers.  相似文献   
56.
57.
58.
This review discusses treatment options for men with premature ejaculation (PE), a common sexual dysfunction characterized by short ejaculatory latency, decreased sexual satisfaction, and distress. For a number of reasons, including embarrassment and the belief that PE is a normal part of aging, that it has no effective treatment, or that it will resolve itself, few men with PE seek treatment. Although several treatment options exist (eg, behavioral, cognitive, and sex therapy methods; desensitizing drugs; off-label use of antidepressants, phosphodiesterase type 5 inhibitors, or à-blockers), the majority of men with PE are not satisfied with their results. New pharmacologic drugs develped specifically for the treatment of PE are undergoing evaluation in clinical trials. For example, recent clinical research studies have revealed on-demand administration of one such drug, dapoxetine, which achieved significant improvements in ejaculatory latency, control over ejaculation, and satisfaction with sexual intercourse. In addition, partners of men who received dapoxetine likewise reported improved satisfaction with sexual intercourse. Future studies may reveal that integration of pharmacologic drugs with psychologic and/or behavioral therapy techniques may be the optimal approach to the management of PE. PE is a treatable condition, and new drugs in development may provide benefits over those available.  相似文献   
59.
60.
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