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   8573篇
  免费   1441篇
  国内免费   65篇
耳鼻咽喉   236篇
儿科学   229篇
妇产科学   233篇
基础医学   760篇
口腔科学   233篇
临床医学   1579篇
内科学   1833篇
皮肤病学   156篇
神经病学   586篇
特种医学   297篇
外科学   1552篇
综合类   112篇
现状与发展   1篇
一般理论   1篇
预防医学   871篇
眼科学   211篇
药学   305篇
中国医学   33篇
肿瘤学   851篇
  2024年   47篇
  2023年   299篇
  2022年   145篇
  2021年   301篇
  2020年   355篇
  2019年   238篇
  2018年   404篇
  2017年   360篇
  2016年   437篇
  2015年   441篇
  2014年   605篇
  2013年   651篇
  2012年   556篇
  2011年   575篇
  2010年   428篇
  2009年   510篇
  2008年   450篇
  2007年   425篇
  2006年   431篇
  2005年   398篇
  2004年   342篇
  2003年   277篇
  2002年   241篇
  2001年   179篇
  2000年   161篇
  1999年   136篇
  1998年   82篇
  1997年   83篇
  1996年   50篇
  1995年   49篇
  1994年   29篇
  1993年   21篇
  1992年   52篇
  1991年   34篇
  1990年   43篇
  1989年   39篇
  1988年   46篇
  1987年   29篇
  1986年   36篇
  1985年   20篇
  1984年   13篇
  1983年   13篇
  1982年   6篇
  1981年   8篇
  1980年   4篇
  1979年   3篇
  1977年   4篇
  1975年   3篇
  1970年   3篇
  1966年   3篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
OBJECTIVE: Our purpose was to assess whether legislative action influenced the role of obstetrician-gynecologists as primary care physicians. STUDY DESIGN: An observational study was performed on the basis of a questionnaire sent to 410 obstetrician-gynecologists and 27 medical directors of managed-care organizations. RESULTS: Of 67% of obstetrician-gynecologists and 96% of medical directors who responded, there was agreement as to the content of primary care, but a minority (38%) of obstetrician-gynecologists identified themselves as primary care providers. A minority of medical directors (35%) felt that obstetrician-gynecologists should serve in that role. Both obstetrician-gynecologists and medical directors felt that legislation had little impact. CONCLUSION: The reticence of obstetrician-gynecologists to assume a major role in primary care appears to be the result of an uneasiness with accepting a more comprehensive role in patient management and gatekeeping. They appear comfortable with the more traditional roles but feel that training and experience has not prepared them well for the management of more complex medical problems. (Am J Obstet Gynecol 1998;178:1222-8.)  相似文献   
14.
15.
The specialty of pain medicine, as noted by Lippe,“… justifies itself as a unique medical specialty by virtue of a distinct body of knowledge and a well-defined scope of practice. In common with other medical specialties, it is founded on an infrastructure of scientific research, education, and clinical practice [1].“ The traditional methods of education for healthcare providers, such as medical schools, nursing schools, physical therapy schools, and clinical psychology programs, do not prepare their students adequately for the delivery of evaluation and treatment services to patients experiencing pain. Also apparent, as evidenced by the dearth of medical literature, is that the traditional methods of educating pain specialists do not adequately prepare students for an effective approach to the realities of healthcare economics in their respective fields.The result of a lack of significant education in the economics of pain medicine can be financially devastating to a new practitioner who is practicing “good” medicine yet not meeting the financial obligations incipient in the operation of a multidisciplinary pain center or even a solo practice. One important concept in the study of healthcare economics is the issue of cost-effectiveness [2].  相似文献   
16.
Clinical practice guidelines have emerged as a reality for medical practitioners over the past 20 years. Although virtually all groups interested in the development of practice guidelines hope for improvements in patient care, secondary expectations vary widely among those using them. Their use in daily practice by physicians has met with resistance from barriers including concerns of “cookbook” medicine, a loss of autonomy, and increased professional liability. The recent experience of the ACR in addressing these challenges illustrates that physicians are receptive to steps perceived to mitigate the risks accompanying the use of guidelines as well as to efforts to increase their understanding of implementing guidelines in clinical practice. The experiences of other medical societies and an inventory of future trends reveal additional challenges associated with the use of practice guidelines, as third parties look to guidelines as points of reference for gauging the performance of health care providers.  相似文献   
17.
A pulsion hernia of the tympanic membrane is an outwardly bulging, thin, atrophic area of the tympanic membrane. Those patients who develop pulsion hernias repeatedly autoinflate the middle ear and consequently maintain a positive middle ear pressure, which pushes the thin atrophic portion of the tympanic membrane laterally beyond the normal plane of the tympanic membrane. The thinness of the tympanic membrane over the pulsion hernia suggests that the herniation has developed through a pre-existing area of weakness where the fibrous middle layer has disappeared.  相似文献   
18.
19.
Tissue-engineered skin substitutes such as Apligraf have emerged over the past 20 years as among the most carefully studied and efficacious of the advanced wound modalities. These products have been proven as effective enhancements to general wound care, promoting wound closure particularly in instances where conventional wound care fails. Marketed for hard-to-heal wounds since 1998, Apligraf has become part of standard wound care in many wound centers across the United States. Despite this situation, few general wound care guidelines incorporate advanced and active wound-healing technologies, such as tissue-engineered skin products. Because of this deficiency, appropriate patient selection and proper use of these product remain largely unaddressed within the general wound care community. Here, we describe the development of guidelines surrounding optimal use of the bilayered living cell therapy, Apligraf, in the treatment of the two types of lower extremity ulcers for which the product is FDA approved: venous leg ulcer and diabetic foot ulcer. The guidelines detailed in this article focus on the identification and selection of patients who are at risk for failure of standard wound care therapy and thus appropriate for Apligraf treatment. The intended audience for these guidelines is the general wound care practitioner, for whom the developed treatment algorithms and accompanying figure legends should provide practical, user-friendly direction simplifying both patient selection and appropriate use of Apligraf within the context of good wound-healing practice.  相似文献   
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