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   112266篇
  免费   43172篇
  国内免费   858篇
耳鼻咽喉   2063篇
儿科学   4686篇
妇产科学   941篇
基础医学   20048篇
口腔科学   11651篇
临床医学   15241篇
内科学   28056篇
皮肤病学   8425篇
神经病学   15187篇
特种医学   3768篇
外国民族医学   2篇
外科学   17626篇
综合类   1477篇
现状与发展   2篇
一般理论   25篇
预防医学   5682篇
眼科学   1980篇
药学   8458篇
  2篇
中国医学   1682篇
肿瘤学   9294篇
  2024年   63篇
  2023年   655篇
  2022年   891篇
  2021年   2483篇
  2020年   5776篇
  2019年   11493篇
  2018年   11079篇
  2017年   12305篇
  2016年   13216篇
  2015年   13576篇
  2014年   13753篇
  2013年   14344篇
  2012年   7083篇
  2011年   6889篇
  2010年   10715篇
  2009年   7112篇
  2008年   4024篇
  2007年   2766篇
  2006年   2572篇
  2005年   2132篇
  2004年   1872篇
  2003年   1852篇
  2002年   1767篇
  2001年   1511篇
  2000年   1329篇
  1999年   860篇
  1998年   459篇
  1997年   391篇
  1996年   316篇
  1995年   291篇
  1994年   249篇
  1993年   204篇
  1992年   297篇
  1991年   221篇
  1990年   210篇
  1989年   168篇
  1988年   174篇
  1987年   144篇
  1986年   104篇
  1985年   134篇
  1984年   101篇
  1983年   97篇
  1982年   74篇
  1981年   72篇
  1979年   52篇
  1978年   60篇
  1977年   44篇
  1976年   35篇
  1975年   47篇
  1974年   45篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
94.
95.
We present a case of benign osteoblastoma of the occipital bone. Benign osteoblastoma is an uncommon primary bone tumor, which usually involves the vertebrae and the long bones. This tumor rarely develops in the calvaria, showing a preference for the temporal and frontal bones when it does. To the best of our knowledge, this case is only the eighth reported case of benign osteoblastoma confined to the occipital bone. A 20‐year‐old male presented with a mild tender mass lesion of the occipital area, just below the lambda. Plain X‐ray films and CT scans demonstrated an osteolytic mass surrounded by the sclerotic rim within the diploic space. MRI proved to be effective for the evaluation of the intracranial and intraosseous extensions of the tumor. However, it was very difficult to formulate a differential diagnosis against other osteoblastic tumors, or osteoid osteoma, in view of its radiological appearance. The final diagnosis was obtained by careful consideration of the histopathological characteristics of the tumor combined with its clinical and radiological features. Although generally regarded as benign, a complete resection is preferred over conventional curettage as this can guard against possible recurrence and malignant transformation.  相似文献   
96.
The present paper deals with a developing training element in cognitive behaviour therapy (CBT), the self‐practice of therapeutic techniques and the self‐exploration of the person of the therapist. Initially, the current status of this training element in CBT is discussed, and a short note on its terminology is presented. Then an overview of the most important objectives of self‐practice and self‐reflection in CBT, and the concepts and methods of practice of this element is given. The concepts focus on two major aims, the self‐exploration of the person of the therapist within and beyond his or her therapeutic practice, and the self‐application of therapeutic techniques (= self‐practice). In the second part of the paper empirical studies related to the outcome of self‐reflection and self‐practice on the development of the therapist and her or his therapeutic practice are reviewed. The few empirical studies show that trainees experience in their own view substantial professional and personal gains from this training tool, with the professional impact being more important than the personal one. The most important outcomes evaluated by subjective data from the trainees are improvements in self‐insight and self‐awareness and a better understanding of the therapist's role and the therapeutic change process. Additionally, a better understanding of CBT methods and of general therapeutic skills, such as empathy and role‐taking‐competencies, are reported by the trainees. The paper comes to the conclusion that self‐exploration and self‐practice are important components of CBT training. Consequences and recommendations for its integration into training courses for CBT are discussed as well as the necessity for more research in this area. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   
97.
Forty Chinese women for elective caesarean section received either propofol 2 mg.kg-1 or thiopentone 4 mg.kg-1 for induction of general anaesthesia. Systolic, mean and diastolic arterial pressures and heart rate were recorded non-invasively every minute for ten minutes. Post-induction arterial pressures were similar to pre-induction values with no differences between thiopentone and propofol. Following intubation, the rise in systolic arterial pressure was greater in the thiopentone group, 32.1 mmHg (SD 23.7) compared with the propofol group, 17.4 mmHg (SD 23.8), (P less than 0.05). In the thiopentone group, arterial pressures were slower in returning to baseline values. Heart rate was initially elevated in both groups to the same degree. At caesarean section, induction with propofol causes less variation in arterial pressure than thiopentone. Hypotension is probably prevented by the coincident stimulus of rapid sequence induction. Neonatal Apgar scores were similar between the two groups.  相似文献   
98.
99.
100.
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