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   180202篇
  免费   33283篇
  国内免费   2458篇
耳鼻咽喉   5485篇
儿科学   6096篇
妇产科学   2780篇
基础医学   7066篇
口腔科学   2143篇
临床医学   29314篇
内科学   53140篇
皮肤病学   7842篇
神经病学   18161篇
特种医学   7520篇
外国民族医学   4篇
外科学   45169篇
综合类   909篇
现状与发展   72篇
一般理论   66篇
预防医学   9679篇
眼科学   3958篇
药学   2855篇
中国医学   32篇
肿瘤学   13652篇
  2024年   695篇
  2023年   4863篇
  2022年   1345篇
  2021年   3479篇
  2020年   6233篇
  2019年   2568篇
  2018年   7886篇
  2017年   7696篇
  2016年   8827篇
  2015年   8867篇
  2014年   16199篇
  2013年   16804篇
  2012年   7385篇
  2011年   7496篇
  2010年   11383篇
  2009年   15167篇
  2008年   7691篇
  2007年   6066篇
  2006年   8485篇
  2005年   5983篇
  2004年   4980篇
  2003年   3816篇
  2002年   3923篇
  2001年   4084篇
  2000年   3244篇
  1999年   3506篇
  1998年   4015篇
  1997年   3811篇
  1996年   3674篇
  1995年   3528篇
  1994年   2210篇
  1993年   1823篇
  1992年   1605篇
  1991年   1652篇
  1990年   1282篇
  1989年   1375篇
  1988年   1190篇
  1987年   1050篇
  1986年   1044篇
  1985年   898篇
  1984年   775篇
  1983年   738篇
  1982年   787篇
  1981年   671篇
  1980年   584篇
  1979年   441篇
  1978年   471篇
  1977年   490篇
  1975年   363篇
  1972年   364篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
Lymphocyte-predominant Hodgkin’s lymphoma (LPHL) differs in histologic and clinical presentation from classical Hodgkin’s lymphoma (cHL). Treatment of LPHL patients using standard Hodgkin’s lymphoma protocols leads to complete remission in more than 95% of patients. Survival and freedom from treatment failure are substantially worse in advanced-stage patients than for early-stage patients. Thus, patients in advanced stages and those in early stages with unfavorable risk factors should be treated similar to those with cHL. In contrast, patients with early-stage LPHL without risk factors might be sufficiently treated with reduced-intensity programs having less severe adverse effects. As a result, treatment of early LPHL is rather heterogeneous, including radiotherapy using extended-fleld technique, involved-fleld radiotherapy (IF-RT), combined-modality treatment, and, more recently, monoclonal antibodies. Watch-and-wait strategy plays an important role in pediatric oncology, to avoid adverse effects associated with therapy. IF-RT seems to be emerging as a treatment of choice for patients with stage IA LPHL; most larger study groups, such as the German Hodgkin Study Group and the European Organisation for Research and Treatment of Cancer, have adopted IF-RT as the treatment of choice for these patients.  相似文献   
12.
13.
14.
15.
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   
16.
17.
18.
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   
19.
20.
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