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   154173篇
  免费   31404篇
  国内免费   2439篇
耳鼻咽喉   5180篇
儿科学   5387篇
妇产科学   2398篇
基础医学   3578篇
口腔科学   1528篇
临床医学   26868篇
内科学   48615篇
皮肤病学   7429篇
神经病学   14867篇
特种医学   6424篇
外科学   41405篇
综合类   251篇
现状与发展   72篇
预防医学   6997篇
眼科学   3594篇
药学   1143篇
中国医学   17篇
肿瘤学   12263篇
  2024年   684篇
  2023年   4802篇
  2022年   1249篇
  2021年   3179篇
  2020年   6074篇
  2019年   2209篇
  2018年   7447篇
  2017年   7379篇
  2016年   8489篇
  2015年   8465篇
  2014年   15558篇
  2013年   15685篇
  2012年   5646篇
  2011年   5649篇
  2010年   10439篇
  2009年   14311篇
  2008年   5910篇
  2007年   4223篇
  2006年   6637篇
  2005年   3916篇
  2004年   3202篇
  2003年   2201篇
  2002年   2245篇
  2001年   3879篇
  2000年   3108篇
  1999年   3303篇
  1998年   3706篇
  1997年   3502篇
  1996年   3399篇
  1995年   3248篇
  1994年   1970篇
  1993年   1587篇
  1992年   1447篇
  1991年   1468篇
  1990年   1100篇
  1989年   1232篇
  1988年   1064篇
  1987年   890篇
  1986年   921篇
  1985年   749篇
  1984年   573篇
  1983年   543篇
  1982年   527篇
  1981年   413篇
  1980年   371篇
  1979年   324篇
  1978年   352篇
  1977年   407篇
  1975年   288篇
  1972年   314篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
32.
33.
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   
34.
35.
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   
36.
37.
38.
Editorial     
  相似文献   
39.
40.
Prostatitis and male infertility are frequent disorders, and the role of prostatitis in male infertility has been under discussion for more than 30 years. Many researchers have shown relevant links between the two. Although a causal relationship has not been definitely demonstrated, increasing evidence shows that chronic prostatitis has a relevant negative impact on male fertility potential, at least in certain subgroups. In the following review, we focus on the present state of knowledge on the role of chronic prostatitis as an etiologic factor in male infertility.  相似文献   
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