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   126168篇
  免费   10704篇
  国内免费   8167篇
耳鼻咽喉   1021篇
儿科学   1562篇
妇产科学   2322篇
基础医学   14816篇
口腔科学   2061篇
临床医学   16412篇
内科学   20672篇
皮肤病学   1448篇
神经病学   6875篇
特种医学   4297篇
外国民族医学   70篇
外科学   13096篇
综合类   18914篇
现状与发展   24篇
一般理论   5篇
预防医学   7809篇
眼科学   3655篇
药学   12785篇
  115篇
中国医学   6045篇
肿瘤学   11035篇
  2024年   348篇
  2023年   1827篇
  2022年   4669篇
  2021年   5884篇
  2020年   4223篇
  2019年   4088篇
  2018年   4128篇
  2017年   3689篇
  2016年   3460篇
  2015年   5213篇
  2014年   6533篇
  2013年   6090篇
  2012年   8900篇
  2011年   9758篇
  2010年   5945篇
  2009年   4733篇
  2008年   6506篇
  2007年   6494篇
  2006年   6536篇
  2005年   6478篇
  2004年   4458篇
  2003年   4211篇
  2002年   3559篇
  2001年   3223篇
  2000年   3309篇
  1999年   3448篇
  1998年   2243篇
  1997年   2169篇
  1996年   1564篇
  1995年   1457篇
  1994年   1266篇
  1993年   819篇
  1992年   1227篇
  1991年   1075篇
  1990年   931篇
  1989年   823篇
  1988年   712篇
  1987年   668篇
  1986年   508篇
  1985年   463篇
  1984年   249篇
  1983年   178篇
  1982年   118篇
  1981年   116篇
  1980年   76篇
  1979年   120篇
  1978年   59篇
  1976年   52篇
  1975年   55篇
  1974年   65篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
A case of untreated fusarial onychomycosis leading to serious consequences is reported. Fusarium solani is a widespread fungus and an occasional human pathogen. It usually invades rapidly in immunocompromised hosts, and often results in a poor outcome despite treatment. We report a woman with diabetes mellitus who had untreated fusarial infection of the nails, which developed into subcutaneous fusariosis, superinfected by bacteria, and then evolved into osteomyelitis that subsequently resulted in septic shock. Early management of mycotic nails in immunocompromised hosts is crucial to prevent life‐threatening disease.  相似文献   
13.
14.
BACKGROUND AND PURPOSE: Thyroidectomy is a common treatment for thyroid disorders in Taiwan, and constitutes a significant percentage of medical expenses. This study investigated the characteristics of thyroidectomy in Taiwan. METHODS: A total of 21 senior general surgeons from 16 medical centers and 5 regional hospitals participated. One surgeon from each hospital reviewed the hospital's medical records of thyroid operations performed in the year 2001. Medical records for 3846 thyroidectomies were retrospectively analyzed, including surgical indications and modalities, complications, pathology reports, and the use of antibiotics. RESULTS: Most of the patients were women (85%). Indications for surgery included proven malignancy (9%), suspicious malignancy (30%), evident compression symptoms (20%), hyperthyroidism (20%), and cosmetic reasons (12%). The majority of patients (78%) underwent a surgical procedure with lobectomy or bilateral thyroidectomy; 13% had unilateral partial thyroidectomy. Prophylactic antibiotics were administered in 46% of procedures, and continued postoperatively in 12%. Postoperative complications occurred in 12% of patients. Hypocalcemia was the most common complication (8%), and its incidence was significantly correlated with the frequency of total thyroidectomy (p < 0.01). Complete pathology reports for the thyroidectomized specimens were available in only 65% of the cases. The frequency of cosmetic reasons for surgery, unilateral subtotal resection, routine antibiotic administration, and incomplete pathology reports were significantly higher in regional hospitals than in medical centers. CONCLUSIONS: Reduction in the high rates of cosmetic reasons for surgery, unilateral partial thyroidectomy, incomplete pathology reports, and use of antibiotic prophylaxis are needed to improve the quality of thyroidectomy in Taiwan.  相似文献   
15.
Pneumocephalus is a very rare complication of video-assisted thoracoscopic surgery (VATS). A 66-year-old man developed pneumocephalus secondary to thoracoscopic excision of a neurogenic tumor in the posterior mediastinum. Pneumocephalus was diagnosed by brain computed tomography. Neurosurgical intervention was performed after conservative therapy had failed. The patient's condition had resolved without any neurologic sequelae 2 years later. When a patient has a relatively large amount of chest tube drainage and neurologic symptoms after VATS, the possibility of pneumocephalus due to cerebrospinal fluid leakage must be considered.  相似文献   
16.
Bradyarrhythmia requiring permanent pacing after heart transplantation remains a common problem. Sinus node dysfunction is the most common indication, and late onset of atrioventricular (AV) block has rarely been reported. We report the case of a patient who developed advanced AV block at 41 months after transplantation. Right bundle branch block with progressive increase of QRS complex duration was noted in serial electrocardiograms. At the time of late AV block development, the patient did not have acute rejection and coronary angiogram was normal. The mechanism of late onset of AV block is unclear, but it may be caused by progressive conduction.  相似文献   
17.
18.
案例教学法在护理伦理学中的应用分析   总被引:1,自引:1,他引:0  
目的分析案例式教学在护理伦理学教学中应用的效果,以探讨适合护理伦理学的教学方法。方法采用传统教学法与案例教学法相对照进行护理伦理学的授课,对528名授课学生进行问卷调查并收集资料。结果92.4%的学生认为案例教学法能激发学习兴趣,87.2%的学生认为能调动学习的积极性,82.6%的学生认为有利于对知识的理解,72.1%的学生认为能培养思维和决策能力,68.0%的学生认为能增进师生互动。结论案例教学法可提高教学效果。培养学生的批判性思维能力。  相似文献   
19.
The growth hormone(GH), produced by the growth hormone cell in pars distalis of the adenohypophysis, acts on the sugar, protein and fat metabolism in various degrees. After trauma, the GH has relations with the energy supply, the maintenance of nitrogen balance, the tissue repair and the body resistance. However, pathological study on the GH cell after burn injury is rare in the literature so far. The purpose of the present investigation is to take a dynamic observation on the ultrastructural changes of the rabbit GH cell after napalm burn within one week. 46 male rabbits were used and divided into two groups, napalm burn group (N = 36) and control group (N = 10). The former is inflicted with 3rd degree burn covering 30% TBSA. The animals of former group were sacrificed at 3, 6, 12, 24, 48, 72, 96, 120, 168 hours postburn respectively. Using the light and electron microscopy and stereological method, the results revealed that: (1) the synthesis activity in GH cell was enhanced, the process of secretion was rapid, and the rate of granule maturation was increased; (2) the nude GH granules were found both in the sinusoids and the endothelial cells; (3) the newly formed mitochondria may be originated from the Golgi complex, and the newly formed Golgi complex from the reutilization of the plasma membrane components; (4) some endothelial cells manifested degeneration, and the others showed in active condition; (5) under the light microscopy, the distribution of the lower tint-phil GH cells had its regional-characteristics.  相似文献   
20.
Follow up MRI study in first episode schizophrenia.   总被引:2,自引:0,他引:2  
  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