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   351854篇
  免费   44876篇
  国内免费   2984篇
耳鼻咽喉   7183篇
儿科学   10591篇
妇产科学   6536篇
基础医学   29864篇
口腔科学   5924篇
临床医学   45330篇
内科学   88958篇
皮肤病学   10037篇
神经病学   34240篇
特种医学   12977篇
外国民族医学   13篇
外科学   71517篇
综合类   3638篇
现状与发展   74篇
一般理论   291篇
预防医学   25620篇
眼科学   7580篇
药学   15199篇
  1篇
中国医学   380篇
肿瘤学   23761篇
  2023年   5433篇
  2022年   2491篇
  2021年   6306篇
  2020年   7821篇
  2019年   5398篇
  2018年   10962篇
  2017年   10208篇
  2016年   11374篇
  2015年   12072篇
  2014年   20870篇
  2013年   23625篇
  2012年   18192篇
  2011年   19347篇
  2010年   17868篇
  2009年   20786篇
  2008年   18971篇
  2007年   18147篇
  2006年   19999篇
  2005年   17861篇
  2004年   16564篇
  2003年   14713篇
  2002年   14327篇
  2001年   5454篇
  2000年   4297篇
  1999年   5055篇
  1998年   6244篇
  1997年   5684篇
  1996年   5343篇
  1995年   4941篇
  1994年   3574篇
  1993年   3115篇
  1992年   2509篇
  1991年   2462篇
  1990年   2024篇
  1989年   2059篇
  1988年   1964篇
  1987年   1815篇
  1986年   1823篇
  1985年   1743篇
  1984年   2001篇
  1983年   1934篇
  1982年   2285篇
  1981年   2007篇
  1980年   1879篇
  1979年   1088篇
  1978年   1260篇
  1977年   1290篇
  1976年   1046篇
  1975年   945篇
  1974年   871篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
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   
52.
53.
54.
Campath-1H (alemtuzumab) induction was used for renal transplantation in combination with sirolimus as immunosuppression. We previously reported a high (28%) rate of early rejection with this regimen, and now report 3-year outcomes. Twenty-nine patients were recipients of either deceased donor or non-HLA (Human Leukocyte Antigen) identical living donor primary renal allografts. Clinical parameters including infection, malignancy, kidney function, and kidney histology were followed prospectively for 3 years. Three-year cumulative graft and patient survival were 96% and 100%, respectively. Twenty patients were maintained on steroid-free immunosuppressive regimens, and 15 patients were maintained on monotherapy for immunosuppression (12 on sirolimus). No serious infectious complications were observed and two patients developed basal cell skin cancer. The 3-year results of our initial pilot study demonstrate good graft (96%) and patient (100%) outcomes. Campath-1H induction has yielded a high proportion of patients maintained on immunosuppressive monotherapy (57%) without serious infectious- and no malignancy-related complications. The reported regimen yielded novel insights into both Campath-1H and sirolimus therapy in renal transplantation. Because of the higher incidence of early rejection, we recommend a modified strategy of immunosuppression including a brief course of a calcineurin inhibitor.  相似文献   
55.
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   
56.
57.
58.
Editorial     
  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