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   22305篇
  免费   3557篇
  国内免费   153篇
耳鼻咽喉   546篇
儿科学   722篇
妇产科学   627篇
基础医学   1805篇
口腔科学   266篇
临床医学   4378篇
内科学   4040篇
皮肤病学   549篇
神经病学   2218篇
特种医学   617篇
外科学   2750篇
综合类   445篇
现状与发展   2篇
一般理论   20篇
预防医学   3785篇
眼科学   424篇
药学   995篇
  2篇
中国医学   115篇
肿瘤学   1709篇
  2024年   125篇
  2023年   710篇
  2022年   585篇
  2021年   1173篇
  2020年   997篇
  2019年   945篇
  2018年   1401篇
  2017年   1153篇
  2016年   1192篇
  2015年   1269篇
  2014年   1406篇
  2013年   1886篇
  2012年   1627篇
  2011年   1546篇
  2010年   1091篇
  2009年   1100篇
  2008年   1067篇
  2007年   939篇
  2006年   811篇
  2005年   679篇
  2004年   545篇
  2003年   437篇
  2002年   341篇
  2001年   211篇
  2000年   131篇
  1999年   169篇
  1998年   306篇
  1997年   312篇
  1996年   323篇
  1995年   264篇
  1994年   191篇
  1993年   135篇
  1992年   91篇
  1991年   90篇
  1990年   77篇
  1989年   95篇
  1988年   71篇
  1987年   57篇
  1986年   49篇
  1985年   56篇
  1984年   51篇
  1983年   50篇
  1982年   43篇
  1981年   51篇
  1980年   27篇
  1979年   13篇
  1978年   19篇
  1977年   17篇
  1976年   18篇
  1975年   11篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
We describe a model of how physician assistants can be used in an academic medical center to expand radiologist productivity, and to enhance the departmental academic and educational missions. At Harborview Medical Center, following a training program and graduated responsibility under supervision, physician assistants provide initial interpretation of radiology studies, consultation to referring physicians, and perform less complicated interventional procedures. Acceptance of physician assistants by the radiologists, radiology residents, and referring physicians has been high. Although the impact of physician assistants on departmental clinical productivity is difficult to measure, our data suggest that radiologists are more efficient when physician assistants are assigned to service, both in terms of numbers of studies interpreted, and timeliness of reporting and billing. As a result of the success of our program, we believe that physician assistants can have an important role in radiology practice.  相似文献   
82.
83.
Kay Smith  RN  BA  CNOR 《AORN journal》2004,79(5):1074
  相似文献   
84.
85.
Although breast milk is recommended as the optimal source of infant nutrition, breastfeeding initiation is below recommended levels, especially among teenage mothers. Breastfeeding initiation rates among Michigan (US) teenage mothers (12-19 y) were compared by demographics and health behaviors. Multivariate analyses determined which factors were significant independent predictors of breastfeeding initiation among teenage mothers enrolled prenatally in the Michigan Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) program in 1995. Significant predictors independently associated with breastfeeding initiation were race/ethnicity, education, marital status, postpartum anemia status, parity, prenatal trimester of WIC enrollment, and smoking. The strongest predictor of breastfeeding initiation differed for white mothers (positive predictor: education beyond high school [OR = 3.13]) and black mothers (negative predictor: multiparous [OR = 0.25]). Initiation rates for this population of teenage mothers fall below the national average for mothers of all ages and the US Healthy People 2010 goals. Research is needed concerning how breastfeeding support and education can be improved to reach the US national health goals.  相似文献   
86.
Chronic rejection is the major hurdle to long-term survival after lung transplantation. Endobronchial infection with Pseudomonas aeruginosa is common in patients with chronic rejection and this may further contribute to deterioration of the allograft. Inhaled tobramycin is commonly used to treat P aeruginosa airways infection in patients with cystic fibrosis. The safety of inhaled tobramycin in transplant recipients, however, has not been established. We describe the first report of a lung transplant recipient who developed renal failure and vestibular injury after receiving inhaled tobramycin. We review the literature regarding the safety of inhaled tobramycin and discuss potential mechanisms that may promote systemic toxicity in transplant recipients.  相似文献   
87.
Dapsone, used for prevention of Pneumocystis jirovecii infections, has been reported to cause hemolytic anemia and methemoglobinemia; its tolerability in solid organ transplant recipients is not well described. We investigated dapsone-related adverse events in patients undergoing solid organ transplantation from 1999 to 2004. Transplant providers identified patients for the investigators who then reviewed the patients' hospital and outpatient records. Sixteen solid organ transplant recipients fit case definitions for dapsone-related hemolytic anemia (n = 11) or methemoglobinemia (n = 5). Median time from event to dapsone discontinuation was 15 days; all patients improved after drug discontinuation. G6PD enzyme activity was normal in all patients whose test results were available. Dapsone may be associated with hemolytic anemia or methemoglobinemia, even with normal G6PD levels. These events are often not promptly recognized, and drug discontinuation is delayed. Dapsone-related hemolytic anemia or methemoglobinemia should be considered in solid organ transplant recipients with unexplained anemia or hypoxia.  相似文献   
88.
89.
An Australian school of nursing's attempt to introduce an evaluation process required by management for clinical educators involved in undergraduate preregistration education is discussed Reliance on student feedback and clinical agencies' perceptions of the quality of teaching were seen as inadequate mechanisms for evaluation The evaluation process adopted incorporated observation of the educators together with self-reflection on their performance We conclude that post-briefings were poorly used and generally not reflective Educators relied heavily on their clinical skills and used a limited range of teaching strategies Whilst evaluation of clinical educators was time consuming and therefore costly, it is argued that it is essential to the integrity of the course The evaluation process has provided direction for support and development of clinical educators within the context of the curriculum  相似文献   
90.
The lived experience of clinical educators   总被引:1,自引:0,他引:1  
This phenomenological study was undertaken to discover the everyday meanings which clinical educators of pre-registration Bachelor of Nursing students attached to their experiences as clinical educators The researcher employed a qualitative design using audiotaped in-depth interviews with four registered nurses employed as clinical educators in four different schools of nursing in Victoria, Australia Using hermeneutics, thematic analysis revealed five themes of meaning central to the lived experiences of clinical educators They are (a) being human, (b) having standards, (c) developing own teaching style, (d) learn as you go, and (e) not belonging The first three themes are described in the literature on clinical education, however, the latter two are unique to this research The results of this study indicate there is need for extensive preparation and on-going support of clinical educators The researcher, who is respectful of the enormity of the task which educators face in preparing students for practice, speculates whether clinical educators are the vanguards of student learning in the clinical field It is evident that the participants of this study did not possess many of the role requirements of clinical educators identified in the literature Further studies are needed which explore the link between student learning and clinical educator support  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