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   51290篇
  免费   7159篇
  国内免费   1435篇
耳鼻咽喉   193篇
儿科学   1044篇
妇产科学   564篇
基础医学   2690篇
口腔科学   2360篇
临床医学   7870篇
内科学   5581篇
皮肤病学   817篇
神经病学   2525篇
特种医学   783篇
外国民族医学   10篇
外科学   4833篇
综合类   9637篇
现状与发展   6篇
一般理论   26篇
预防医学   4770篇
眼科学   798篇
药学   6750篇
  474篇
中国医学   5235篇
肿瘤学   2918篇
  2024年   245篇
  2023年   1184篇
  2022年   1920篇
  2021年   3160篇
  2020年   3534篇
  2019年   2527篇
  2018年   2336篇
  2017年   2680篇
  2016年   2634篇
  2015年   2255篇
  2014年   3857篇
  2013年   4239篇
  2012年   3384篇
  2011年   3488篇
  2010年   2719篇
  2009年   2363篇
  2008年   2289篇
  2007年   2360篇
  2006年   2038篇
  2005年   1669篇
  2004年   1443篇
  2003年   1301篇
  2002年   1021篇
  2001年   811篇
  2000年   653篇
  1999年   492篇
  1998年   423篇
  1997年   387篇
  1996年   328篇
  1995年   260篇
  1994年   267篇
  1993年   174篇
  1992年   208篇
  1991年   165篇
  1990年   147篇
  1989年   148篇
  1988年   135篇
  1987年   115篇
  1986年   76篇
  1985年   92篇
  1984年   72篇
  1983年   40篇
  1982年   47篇
  1981年   39篇
  1980年   36篇
  1979年   24篇
  1978年   15篇
  1977年   15篇
  1976年   18篇
  1975年   20篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
Reflections and Perspectives on Pediatric Psychology: Editor's Vale Dictum   总被引:4,自引:3,他引:1  
Reviews major activities of the Editor and changes in the Journalof Pediatric Psychology (JPP) for issues published in 1993 through1997. Significant trends and accomplishments are reviewed, includingthe increased use of Special Issues and Special Sections tohighlight current pediatric psychological research. Articlespublished during the term are analyzed interms of article typeand population type Comarisons are made to earlier trends inJPP publication as reported by Roberts (1 992).  相似文献   
102.
A study to explore the role of a community oncology nurse specialist   总被引:1,自引:0,他引:1  
Cancer patients are increasingly being cared for in the community. However, the role of the community oncology nurse specialist (CONS) remains a rare appointment in the United Kingdom. There is little research evidence to substantiate the view that this is a worthwhile and effective role. This study aimed to explore the role of one CONS using a qualitative case study approach. The sample consisted of the CONS, seven patients, no relatives and five community nurses. Semi-structured interviews were used to elicit the view of these participants. In addition, documents containing details of the CONS's work to date were reviewed. A number of the CONS's role components were identified by the different respondent groups. Five themes were identified within the data collected: functions of the CONS, communication between the CONS and other health care professionals, structural and organizational factors, characteristics of the service and benefits to patients and their families. Furthermore, all respondent groups were positive about the service offered by the CONS, and felt that the role was valuable. Some negative features were identified and these were concerned with organizational aspects of the service. The findings suggest the need for further research and evaluation in this area.  相似文献   
103.
104.
There is little agreement about the methodology of clinical trials of antipsychotic drugs in patients with negative symptoms. A literature review revealed wide variation in experimental design, rating scales and study duration. This reflects differing views as to the definition and response to treatment of negative symptoms. Some degree of standardization would improve comparability of studies and aid the development of new compounds. Patients included in such studies should have displayed negative symptoms for at least 6 months. Depressive symptoms, positive schizophrenic symptoms and extrapyramidal signs may all influence or be confused with negative symptoms and may respond to treatment; they should be at a low level at baseline and should be measured during the study period. Studies should last at least 8 weeks. Several scales are available for measuring negative symptoms and are reviewed; a global impression score should be used additionally.  相似文献   
105.
At the present time, there are many fundamental issues coming from the Department of Health or from other national organizations, which will have an effect on the future development of the dietetic profession. The British Diatetic Association (BDA) Professional Development Committee will consider these issues, as and when appropriate, and will publish the information in the form of Briefing Papers.
The first Briefing Paper on 'Quality Assurance' was published by the BDA in November 1989. The second on 'Measuring clinical outcome' is published below. In each case the opinion of BDA members and specialist groups has been sought and the Professional Development Committee wishes to thank individuals and the specialist groups for their comments.
The Briefing Papers are intended to provide information and promote discussion among the membership. I would welcome further comments from readers, which may be directed to the British Dietetic Association Office.  相似文献   
106.
Credentialed Persons, Credentialed Knowledge   总被引:1,自引:0,他引:1  
The vast experimental literature on human error agrees with history of medicine, folklore, and superstition In discrediting knowledge claims based solely on anecdotal impressions. Since clinical experience consists of anecdotal impressions by practitioners, tt Is unavoidably a mixture of truths, half-truths, and falsehoods. The scientific method is the only known way to distinguish these, and it is both unscholariy and unethical for psychologists who deal with other persons' health, careers, money, freedom, and even life itself to pretend that clinical experience suffices and that quantitative research on diagnostic and therapeutic procedures is not needed. Disputes about philosophy of science (e.g., logical positivism) are irrelevant to this issue, which is simply one of distinguishing knowledge claims that bring reliable credentials and others that do not.  相似文献   
107.
The present article presents the future of clinical psychology board certification. With the increasing specialization in the field of professional psychology and the generic nature of state licensure, clinical psychology as a specialty will develop into a specialty area in a similar fashion as have specialties in medicine. A brief history of board certification in professional psychology by the American Board of Professional Psychology is reviewed and the process of becoming board certified in either clinical psychology or clinical child and adolescent psychology is discussed.  相似文献   
108.
目的 通过分析 3 0例急性单发性球形肺炎的临床与CT特点 ,提高与周围性肺癌的鉴别能力。方法 对 3 0例住院患者 ,入院后均行胸片、胸部CT、纤维支气管镜检查及痰涂片、痰细菌培养等检查。结果 痰细菌培养均为细菌感染 ,胸片、胸部CT显示病灶为贴近胸膜或沿支气管血管束分布占 70 .0 0 % ;分布在两肺下叶背段或后基底段占 60 .0 0 %。病灶直径 2 .0~ 4.5cm 2 4例 ,占 80 .0 0 % ,2 5例患者经抗炎治疗病灶完全吸收。结论 抗炎治疗是动态观察单发性球形肺炎病灶变化的一种有效方法。  相似文献   
109.
Groin complications remain the most common complication of cardiac catheterization procedures. While the use of closure devices is increasing for arterial sheaths, venous sheaths tend to be removed and hemostasis achieved with manual compression. We report our experience using Perclose suture-mediated vascular closure device to achieve hemostasis and early mobility in patients who have had venous access as part of their procedure. There were a total of 42 patients (21 males; average age, 63.5 years) studied. The majority of the patients had 7 Fr sheaths (24), with access sites of sheaths up to 14 Fr being closed with this technique. Two patients developed complications at the access site: one patient requiring rehospitalization for intravenous antibiotics because of late access site infection, and one patient with deep venous thrombosis and pulmonary emboli. We conclude that the use of the Perclose suture-mediated closure device for closure of femoral venous access sites is feasible and should be considered especially in patients with larger venous sheaths and those at increased risk of groin complications.  相似文献   
110.
目的为探讨肾输尿管结石的临床特点,以提出更好的防治措施。方法对原西南师范大学医院1997-2004年治疗的128例肾输尿管结石病例的临床资料进行统计分析。结果本组病例男女之比为2.05∶1,29岁以下发病103例,占80.5%。2001年起发病呈上升趋势,2003年最高。每年9-10月是发病高峰,占本组病例的31.2%。经体外震波碎石99例,3个月结石排净率为83%,与文献报道的基本一致。结论该校肾输尿管结石患者,男性多于女性,30岁以下居多。发病近年增加,体外震波碎石疗效好。  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