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   1184篇
  免费   139篇
  国内免费   49篇
耳鼻咽喉   10篇
儿科学   96篇
妇产科学   20篇
基础医学   105篇
口腔科学   44篇
临床医学   101篇
内科学   340篇
皮肤病学   29篇
神经病学   20篇
特种医学   190篇
外科学   65篇
综合类   98篇
预防医学   72篇
眼科学   50篇
药学   72篇
中国医学   3篇
肿瘤学   57篇
  2023年   16篇
  2022年   15篇
  2021年   24篇
  2020年   21篇
  2019年   9篇
  2018年   19篇
  2017年   41篇
  2016年   37篇
  2015年   29篇
  2014年   63篇
  2013年   69篇
  2012年   25篇
  2011年   22篇
  2010年   62篇
  2009年   67篇
  2008年   25篇
  2007年   63篇
  2006年   34篇
  2005年   29篇
  2004年   26篇
  2003年   9篇
  2002年   12篇
  2001年   30篇
  2000年   18篇
  1999年   18篇
  1998年   78篇
  1997年   64篇
  1996年   59篇
  1995年   51篇
  1994年   45篇
  1993年   42篇
  1992年   13篇
  1991年   8篇
  1990年   20篇
  1989年   22篇
  1988年   25篇
  1987年   21篇
  1986年   20篇
  1985年   19篇
  1984年   12篇
  1983年   12篇
  1982年   9篇
  1981年   4篇
  1980年   8篇
  1979年   4篇
  1978年   6篇
  1977年   5篇
  1976年   13篇
  1975年   16篇
  1973年   5篇
排序方式: 共有1372条查询结果,搜索用时 15 毫秒
991.
992.
Autosomal dominant hyper IgE (HIES or Job's) syndrome is a rare primary immune deficiency characterized by eczema, recurrent skin and lung infections, extremely elevated serum IgE, and a variety of connective tissue and skeletal abnormalities. Individuals with HIES share a characteristic facial appearance and many oral manifestations including retained primary dentition, a high arched palate, variations of the oral mucosa and gingiva, and recurrent oral candidiasis. Mutations in STAT3 account for the majority, if not all, of the cases of autosomal dominant HIES, but the pathogenesis of the many varied features remains poorly understood. In this review, we discuss the clinical phenotype of HIES including immunologic and non-immunologic features, the genetics of HIES, and treatment.  相似文献   
993.
994.
995.
BACKGROUND: Patients and purchasers prefer board-certified physicians, but whether these physicians provide better quality of care and outcomes for hospitalized patients is unclear. OBJECTIVE: We evaluated whether care by board-certified physicians after acute myocardial infarction (AMI) was associated with higher use of clinical guideline recommended therapies and lower 30-day mortality. SUBJECTS AND METHODS: We examined 101,251 Medicare patients hospitalized for AMI in the United States and compared use of aspirin, beta-blockers, and 30-day mortality according to the attending physicians' board certification in family practice, internal medicine, or cardiology. RESULTS: Board-certified family practitioners had slightly higher use of aspirin (admission: 51.1% vs 46.0%; discharge: 72.2% vs 63.9%) and beta-blockers (admission: 44.1% vs 37.1%; discharge: 46.2% vs 38.7%) than nonboard-certified family practitioners. There was a similar pattern in board-certified Internists for aspirin (admission: 53.7% vs 49.6%; discharge: 78.2% vs 68.8%) and beta-blockers (admission: 48.9% vs 44.1%; discharge: 51.2% vs 47.1). Board-certified cardiologists had higher use of aspirin compared with cardiologists certified in internal medicine only or without any board certification (admission: 61.3% vs 53.1% vs 52.1%; discharge: 82.2% vs 71.8% vs 71.5%) and beta-blockers (admission: 52.9% vs 49.6% vs 41.5%; discharge: 54.7% vs 50.6% vs 42.5%). In multivariate regression analyses, board certification was not associated with differences in 30-day mortality. CONCLUSIONS: Treatment by a board-certified physician was associated with modestly higher quality of care for AMI, but not differences in mortality. Regardless of board certification, all physicians had opportunities to improve quality of care for AMI.  相似文献   
996.

Background  

The attitudes of patients' to consent have changed over the years, but there has been little systematic study of the attitudes of anaesthetists and surgeons in this process. We aimed to describe observations made on the attitudes of medical professionals working in the UK to issues surrounding informed consent.  相似文献   
997.
衡立君  高国栋  王学廉  贺世明 《医学争鸣》2005,26(12):1088-1088
1 临床资料患者,女性,35岁,主因"失眠、焦虑8 a余,加重伴思维障碍、行为异常6 a,被害妄想2 mo"入院.病史特点为心理应激后出现神经衰弱症状.发展期渐出现思维逻辑错乱、脱离现实,认为与父母无血缘关系;情感、思维、意志行为与周围环境不协调;生育后有孩子被害妄想.其母患抑郁症.无神经系统查体及CT阳性发现.  相似文献   
998.
The long-term follow up after trabeculectomy   总被引:2,自引:0,他引:2  
THE AIM OF THE STUDY: To estimate the efficacy of trabeculectomy for primary open angle glaucoma. MATERIAL AND METHODS: Since 1990 to 2000 we observed 91 eyes of 79 patients (53 women and 26 men) aged 39-86. The results of performed surgery were valued directly after the trabeculectomy and in period of over 8 years. We carried out the examinations of visual acuity, intraocular pressure, visual field, state of optic nerve head, type of bleb following trabeculectomy and the necessity of applying additional topical treatment. The trabeculectomies were performed in a typical way. Some surgeons made a square or triangular superficial scleral flap based at the limbus, measuring from 2.5 x 3.0 to 4 x 4 mm or 3 x 3 mm. The deep block of scleral tissue with trabeculum (from 0.5 x 1.0 to 2.5 x 3.0 mm) was excised, the superficial cauterisation and the peripheral iridectomy were performed in every case. The scleral flap and conjunctiva were sutured with 10/0 Ethilon, 8/0 Vicryl or 6/0 Mersilk. RESULTS: The patients were divided into 3 groups depending on observation period: I--up to 4 years, II--from 5 to 8 years, III--over 8 years. We confirmed the normalisation of IOP in 80%, 73%, 90% and the successful control of visual field (no progress) in 82%, 77%, 70% of adequate groups. In the first and second group 45-50% of patients could resist from topical treatment, but after 8 years as many as 80% required additional pharmacological treatment. CONCLUSION: The trabeculectomy is the effective surgery in most patients with open angle glaucoma. The effectiveness of trabeculectomy can be controlled by the size of extracted deep scleral flap with trabeculum. For the stability of visual field it is necessary to keep the intraocular pressure at 13-18 mm Hg level.  相似文献   
999.

Background

The clinical utility of the Rorschach test in Indians is hampered by the absence of reliable normative data. Method : The Rorschach by Dlopfer''s method was administrated to 1256 subjects consisting of 300 normal army personnel, 300 normal civilians, 250 schizophrenics, 300 neurotics and 106 patients with organic disorders.

Results

The Rorschach protocols of normal Indian army personnel and normal civilians showed significant differences from one another and also from the western norms. These differences are culturally determined and are not indicative of low intelligence or psychopathology. Patients with schizophrenia, neurosis, head injury and epilepsy show significant differences from the records of normal subjects. The protocols of army schizophrenics show significant deviations from those of normal army personnel and these changes revert to normal with clinical recovery.

Conclusion

The Rorschach test is not a culture fee test as claimed earlier. In view of the differences from Western norms, Rorschach protocols of Indians should be interpreted using the norms for Indians. In the case of army personnel the norms for army personnel should be used. While the use of the Rorschach to study the personality patterns of normal individuals and as an aid to clinical diagnosis was strongly supported, the findings of the study indicate that the test can also be employed to assess therapeutic response of patients with schizophrenia.Key Words: Rorschach test, norms, schizophrenia, neurosis  相似文献   
1000.
PURPOSE: To direct attention on every-day problems in choroideremia, which are not a barrier in patients occupation. MATERIAL AND METHODS: Two cases of patients with choroideremia which was diagnosed when they were 30 and 54 are described. In spite of widespread visual field changes patients with good visual acuity did not have to change their lifestyles or their jobs (miner and mechanic). Visual acuity, visual field, mesoptometry, adaptometry, electroretinography, electrooculography were done. The mother of the younger patient was also examined. Her fundus of the eye showed typical changes for carriers. In the older patient's family among 41 family members 7 men were affected in 3 generations. Follow-up was 6 years. RESULTS: In ERG rod activity was very low or abolished and cone activity was reduced, more in older patient. In the younger patient visual acuity and mesoptometry were normal, rod adaptation was very low. The patient was able to work as a miner due to good mesopic vision. In follow-up no significant progression of the disease was observed. The older patient had previously been treated for retinitis pigmentosa for a few years. Diagnosis of choroideremia was made when visual acuity of the patient declined. It was impossible to perform mesoptometry and adaptometry because of advanced night blindness. In the dark room the patient found it very difficult to move. In follow-up lowering of the visual acuity, progression of visual field as well as electroretinographic changes occurred. CONCLUSIONS: Patients with choroideremia may be professionally engaged despite of every-day problems connected with widespread scotomas in visual field and nyctalopia. They should not become pensioners too early. The disease progression is faster in older than in younger patients.  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