全文获取类型
收费全文 | 2762篇 |
免费 | 172篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 11篇 |
儿科学 | 153篇 |
妇产科学 | 93篇 |
基础医学 | 369篇 |
口腔科学 | 117篇 |
临床医学 | 208篇 |
内科学 | 432篇 |
皮肤病学 | 141篇 |
神经病学 | 149篇 |
特种医学 | 74篇 |
外科学 | 190篇 |
综合类 | 104篇 |
一般理论 | 6篇 |
预防医学 | 212篇 |
眼科学 | 74篇 |
药学 | 288篇 |
中国医学 | 25篇 |
肿瘤学 | 302篇 |
出版年
2023年 | 22篇 |
2022年 | 57篇 |
2021年 | 92篇 |
2020年 | 68篇 |
2019年 | 55篇 |
2018年 | 74篇 |
2017年 | 63篇 |
2016年 | 91篇 |
2015年 | 77篇 |
2014年 | 103篇 |
2013年 | 130篇 |
2012年 | 242篇 |
2011年 | 230篇 |
2010年 | 139篇 |
2009年 | 103篇 |
2008年 | 158篇 |
2007年 | 146篇 |
2006年 | 127篇 |
2005年 | 144篇 |
2004年 | 131篇 |
2003年 | 109篇 |
2002年 | 89篇 |
2001年 | 40篇 |
2000年 | 32篇 |
1999年 | 40篇 |
1998年 | 24篇 |
1997年 | 18篇 |
1996年 | 17篇 |
1995年 | 17篇 |
1994年 | 9篇 |
1993年 | 10篇 |
1992年 | 20篇 |
1991年 | 18篇 |
1990年 | 16篇 |
1989年 | 23篇 |
1988年 | 26篇 |
1987年 | 17篇 |
1986年 | 23篇 |
1985年 | 12篇 |
1984年 | 18篇 |
1983年 | 15篇 |
1982年 | 10篇 |
1981年 | 7篇 |
1980年 | 11篇 |
1979年 | 14篇 |
1973年 | 5篇 |
1971年 | 5篇 |
1970年 | 7篇 |
1969年 | 5篇 |
1968年 | 5篇 |
排序方式: 共有2948条查询结果,搜索用时 15 毫秒
21.
Singh RK Kapoor S Sahni P Chattopadhyay TK 《Annals of the Royal College of Surgeons of England》2007,89(5):490-493
INTRODUCTION
Haemangioma is the most common liver tumour. Treatment is indicated for symptomatic tumours, rapid increase in size, rupture or doubt in diagnosis. There is continuing debate regarding the ideal method of surgical treatment for liver haemangiomas, with some surgeons favouring enucleation over liver resection.PATIENTS AND METHODS
Retrospective analysis of prospectively compiled database of patients who were surgically treated for liver haemangioma.RESULTS
Between 1987 and 2003, we operated on 21 patients with liver haemangioma. Pre-operative diagnosis on imaging was made in 16 patients (13 symptomatic, 3 had progressive increase in size). In five patients, the indication of surgery was uncertain diagnosis. Enucleation was performed in 9 patients and liver resection in 12. The size of the haemangioma was similar in the enucleation and resection groups (8.9 cm versus 10 cm; P = 0.85). The mean intra-operatiive blood loss was significantly less in the enucleation group (400 ml versus 1330 ml; P = 0.004). The mean operative time was significantly less in the enucleation group as compared to the resection group (170 min versus 230 min; P = 0.035). Five patients had major postoperative morbidity in the resection group as compared to none in the enucleation group (P = 0.045). The duration of hospital stay was significantly longer in the resection group.(9.9 days versus 5.6 days; P = 0.005).CONCLUSIONS
Enucleation of liver haemangiomas is safer, quicker and associated with less morbidity than liver resection. Except for some situations, such as uncertain diagnosis or total replacement of a lobe, we recommend enucleation as the surgical procedures of choice for the treatment of hepatic haemangiomas. 相似文献22.
Ketan D. Mehta Rashmi Gundappa Rajiv Contractor Viral Sangani Ashit Pathak Priti Chawda 《World journal of surgery》2010,34(8):1828-1831
Background
Lung hydatid disease is an endemic problem in Mediterranean countries, and the ideal surgical management for it is still debated. In this prospective study, we aimed to evaluate the feasibility and safety of thoracoscopy in patients with lung hydatid disease. We studied the advantages of thoracoscopic procedure over posterolateral thoracotomy. 相似文献23.
Xue Zeng Haoyan Chen Rashmi Gupta Oscar Paz‐Altschul Anne M. Bowcock Wilson Liao 《Experimental dermatology》2013,22(10):679-681
Psoriasis is an inflammatory, immune‐mediated disease of the skin. Several studies have suggested that natural killer (NK) cells and their receptors may be important for its pathogenesis. Here, we examined whether deletion of the activating natural killer receptor gene NKG2C, which has a frequency of 20% in the European population, was associated with psoriasis susceptibility. The NKG2C deletion and a functional polymorphism in its ligand HLA‐E were genotyped in a Caucasian cohort of 611 psoriasis cases and 493 controls. We found that the NKG2C deletion was significantly increased in cases compared with controls [0.258 vs 0.200, P = 0.0012, OR = 1.43 (1.15–1.79)]. The low‐expressing HLA‐E*01:01 allele was associated with psoriasis (P = 0.0018), although this association was dependent on HLA‐C. Our findings support a potential immunoregulatory role for NK cells in psoriasis and suggest the importance of future studies to investigate the contribution of NK cells and their regulatory receptors to the pathogenesis of psoriasis. 相似文献
24.
Rashmi G Mathew 《国际眼科杂志》2007,7(3):621-622
目的:讨论孕妇Valsalva视网膜病变保守或手术治疗方法的选择.方法:一健康孕妇在自然阴道分娩时,右眼底发生黄斑前玻璃体后界膜下出血,本文报道其保守治疗的效果.结果:右眼发病3wk时积血收缩,视力为眼前手动,但病程6mo时,积血溶解,视力恢复至6/5.结论:大多数Valsalva视网膜病变能够自愈.对一些难治性病例,采用Nd:YAG激光行内界膜切开具有一定的效果.而早期玻璃体切除术的增殖膜切除,对预防眼底新生血管膜的发生也具有一定的效果. 相似文献
25.
Parihar Rashmi Shukla Ruchi Baishya Bikash Kalita Jayantee Haldar Rudrashish Misra Usha Kant 《Metabolic brain disease》2022,37(3):773-785
Metabolic Brain Disease - We report the potential role of 1H Nuclear Magnetic Resonance (NMR) based metabolomics in tuberculous meningitis (TBM). We also correlate the significant metabolites with... 相似文献
26.
Purpose of Review
The purpose of this review is to provide an update on the clinical features, diagnosis, pathogenesis, epidemiology, and treatment of the rare primary headache disorders short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) and short-lasting unilateral neuralgiform headache attacks with autonomic symptoms (SUNA). Together these entities are known as short-lasting unilateral neuralgiform headache attacks (SUNHA).Recent Findings
Recent case reports of secondary SUNCT and SUNA due to medullary infarcts support the theory that the trigeminohypothalamic pathway is involved in the pathophysiology of SUNHA. While medical therapy for SUNHA has not significantly changed, surgical therapy for refractory SUNCT and SUNA has made advancements with a recent case series demonstrating the efficacy of deep brain stimulation.Summary
We will discuss the pathophysiology of both the pain and the autonomic symptoms experienced in SUNCT and SUNA attacks as well the medical, procedural, and surgical options for treatment with emphasis on recent advances. Specific secondary causes reported in the recent literature will be discussed in brief.27.
28.
29.
30.
Jessica Irving Rashmi Patel Dominic Oliver Craig Colling Megan Pritchard Matthew Broadbent Helen Baldwin Daniel Stahl Robert Stewart Paolo Fusar-Poli 《Schizophrenia bulletin》2021,47(2):405
BackgroundUsing novel data mining methods such as natural language processing (NLP) on electronic health records (EHRs) for screening and detecting individuals at risk for psychosis. MethodThe study included all patients receiving a first index diagnosis of nonorganic and nonpsychotic mental disorder within the South London and Maudsley (SLaM) NHS Foundation Trust between January 1, 2008, and July 28, 2018. Least Absolute Shrinkage and Selection Operator (LASSO)-regularized Cox regression was used to refine and externally validate a refined version of a five-item individualized, transdiagnostic, clinically based risk calculator previously developed (Harrell’s C = 0.79) and piloted for implementation. The refined version included 14 additional NLP-predictors: tearfulness, poor appetite, weight loss, insomnia, cannabis, cocaine, guilt, irritability, delusions, hopelessness, disturbed sleep, poor insight, agitation, and paranoia. ResultsA total of 92 151 patients with a first index diagnosis of nonorganic and nonpsychotic mental disorder within the SLaM Trust were included in the derivation (n = 28 297) or external validation (n = 63 854) data sets. Mean age was 33.6 years, 50.7% were women, and 67.0% were of white race/ethnicity. Mean follow-up was 1590 days. The overall 6-year risk of psychosis in secondary mental health care was 3.4 (95% CI, 3.3–3.6). External validation indicated strong performance on unseen data (Harrell’s C 0.85, 95% CI 0.84–0.86), an increase of 0.06 from the original model. ConclusionsUsing NLP on EHRs can considerably enhance the prognostic accuracy of psychosis risk calculators. This can help identify patients at risk of psychosis who require assessment and specialized care, facilitating earlier detection and potentially improving patient outcomes. 相似文献