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   160886篇
  免费   31704篇
  国内免费   2453篇
耳鼻咽喉   5261篇
儿科学   5648篇
妇产科学   2585篇
基础医学   4146篇
口腔科学   2001篇
临床医学   27478篇
内科学   49483篇
皮肤病学   7601篇
神经病学   15290篇
特种医学   6645篇
外国民族医学   4篇
外科学   42484篇
综合类   764篇
现状与发展   72篇
一般理论   10篇
预防医学   7668篇
眼科学   3628篇
药学   1891篇
中国医学   75篇
肿瘤学   12309篇
  2024年   694篇
  2023年   4940篇
  2022年   1753篇
  2021年   3806篇
  2020年   6358篇
  2019年   2598篇
  2018年   7919篇
  2017年   7595篇
  2016年   8730篇
  2015年   8738篇
  2014年   15914篇
  2013年   16139篇
  2012年   6245篇
  2011年   6243篇
  2010年   10713篇
  2009年   14538篇
  2008年   6265篇
  2007年   4498篇
  2006年   6899篇
  2005年   4180篇
  2004年   3451篇
  2003年   2312篇
  2002年   2415篇
  2001年   3849篇
  2000年   3068篇
  1999年   3265篇
  1998年   3708篇
  1997年   3495篇
  1996年   3393篇
  1995年   3256篇
  1994年   1973篇
  1993年   1582篇
  1992年   1403篇
  1991年   1450篇
  1990年   1091篇
  1989年   1209篇
  1988年   1034篇
  1987年   875篇
  1986年   919篇
  1985年   739篇
  1984年   570篇
  1983年   544篇
  1982年   527篇
  1981年   424篇
  1980年   379篇
  1979年   323篇
  1978年   339篇
  1977年   406篇
  1975年   289篇
  1972年   307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