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   3063篇
  免费   266篇
  国内免费   23篇
耳鼻咽喉   68篇
儿科学   46篇
妇产科学   58篇
基础医学   338篇
口腔科学   139篇
临床医学   262篇
内科学   574篇
皮肤病学   91篇
神经病学   135篇
特种医学   80篇
外科学   367篇
综合类   104篇
一般理论   1篇
预防医学   304篇
眼科学   84篇
药学   397篇
中国医学   63篇
肿瘤学   241篇
  2023年   45篇
  2022年   60篇
  2021年   248篇
  2020年   175篇
  2019年   153篇
  2018年   196篇
  2017年   140篇
  2016年   159篇
  2015年   136篇
  2014年   199篇
  2013年   202篇
  2012年   298篇
  2011年   297篇
  2010年   147篇
  2009年   100篇
  2008年   133篇
  2007年   95篇
  2006年   95篇
  2005年   91篇
  2004年   86篇
  2003年   57篇
  2002年   53篇
  2001年   10篇
  2000年   10篇
  1999年   7篇
  1998年   3篇
  1997年   6篇
  1996年   10篇
  1995年   5篇
  1994年   7篇
  1993年   2篇
  1992年   12篇
  1991年   3篇
  1990年   5篇
  1989年   10篇
  1988年   8篇
  1987年   5篇
  1986年   6篇
  1985年   12篇
  1984年   5篇
  1983年   5篇
  1982年   8篇
  1981年   4篇
  1980年   3篇
  1979年   8篇
  1978年   6篇
  1977年   3篇
  1976年   3篇
  1975年   2篇
  1970年   2篇
排序方式: 共有3352条查询结果,搜索用时 109 毫秒
1.
Journal of Thrombosis and Thrombolysis - Multidisciplinary pulmonary embolism (PE) response teams have garnered widespread adoption given the complexities of managing acute PE and provide a...  相似文献   
2.
AIM: To compare the diagnostic ability of glaucoma parameters measured by the optical coherence tomography (OCT) in normal, preperimetric glaucoma (PPG) and perimetric glaucoma (PG) patients. METHODS: This cross-sectional observational study includes 127 eyes of 127 subjects. Patients were divided into PPG (51 eyes), PG (46 eyes), and normal controls (30 eyes) based on clinical optic disc assessment and Humphrey visual field changes. The Heidelberg Spectralis OCT machine using Glaucoma Module Premium Edition software was used to measure the retinal nerve fiber layer (RNFL) and Bruch’s membrane opening-minimum rim width (BMO-MRW) to assess the optic nerve head and ganglion cell layer (GCL) thickness in the macula. RESULTS: RNFL, MRW, and GCL thickness were all significantly thinner in PG compared to PPG and the normal group. The BMO-MRW parameters showed better specificity (>70%) at 90% specificity compared to both RNFL and GCL parameters to discriminate normal, PPG, and PG patients. All BMO-MRW parameters showed higher area under curves (AUC) compared to RNFL and GCL parameters with the highest AUC observed in the superotemporal sector of the BMO-MRW (AUC=0.819 and and 0.897 between normal and PPG and PG groups respectively). CONCLUSION: While the BMO-MRW best discriminates PPG and PG against normal eyes, GCL parameters poorly differentiate the three groups.  相似文献   
3.
4.
Nasopharyngeal carcinoma (NPC) is originated from the epithelial cells of nasopharynx, Epstein–Barr virus (EBV)-associated and has the highest incidence and mortality rates in Southeast Asia. Late presentation is a common issue and early detection could be the key to reduce the disease burden. Sensitivity of plasma EBV DNA, an established NPC biomarker, for Stage I NPC is controversial. Most newly reported NPC biomarkers have neither been externally validated nor compared to the established ones. This causes difficulty in planning for cost-effective early detection strategies. Our study systematically evaluated six established and four new biomarkers in NPC cases, population controls and hospital controls. We showed that BamHI-W 76 bp remains the most sensitive plasma biomarker, with 96.7% (29/30), 96.7% (58/60) and 97.4% (226/232) sensitivity to detect Stage I, early stage and all NPC, respectively. Its specificity was 94.2% (113/120) against population controls and 90.4% (113/125) against hospital controls. Diagnostic accuracy of BamHI-W 121 bp and ebv-miR-BART7-3p were validated. Hsa-miR-29a-3p and hsa-miR-103a-3p were not, possibly due to lower number of advanced stage NPC cases included in this subset. Decision tree modeling suggested that combination of BamHI-W 76 bp and VCA IgA or EA IgG may increase the specificity or sensitivity to detect NPC. EBNA1 99 bp could identify NPC patients with poor prognosis in early and advanced stage NPC. Our findings provided evidence for improvement in NPC screening strategies, covering considerations of opportunistic screening, combining biomarkers to increase sensitivity or specificity and testing biomarkers from single sampled specimen to avoid logistic problems of resampling.  相似文献   
5.
Objective: To determine the level of self-efficacy for coping with breast cancer among Malaysian women and its association with socio-demographic and clinical variables. Materials and Methods: This cross-sectional study involved 168 women diagnosed with breast cancer. The inclusion criteria were age >18 years old, having histologically confirmed breast cancer, and being diagnosed between January 1, 2009 to December 31, 2012. The exclusion criteria were being illiterate and having cognitive impairment. For data collection patients’ medical records and the Cancer Behaviour Inventory-Brief (CBI-B) Malay version questionnaire were used. Simple and multiple logistic regression methods were used to analyse the data. Results: Patients’ mean (SD) age was 51.4 (10.8) years old. Most of the patients were Malays, married, diagnosed at stage 2 breast cancer (41%), and completed their breast cancer treatment. The mean score for self-efficacy for coping with breast cancer was 83.67 (95% CI: 81.87, 85.47). The significant factors positively correlated with self-efficacy for coping with breast cancer were higher educational background and a higher family income. However, factors such as a family history of breast cancer and breast surgery reduced the mean score of self-efficacy for coping with breast cancer. Conclusion: The mean score of self-efficacy for coping with breast cancer in this study was moderate. Self-efficacy for coping with breast cancer in Hospital Universiti Sains Malaysia was not adequate among sufferers and improvement is needed probably by providing education to these patients.  相似文献   
6.
Clinical Autonomic Research - Comparison of hemodynamic profiles and pain scores in diabetic patients undergoing diabetic foot surgery receiving peripheral nerve block (PNB) or spinal anesthesia...  相似文献   
7.
8.

Autoinflammatory diseases constitute a family of disorders defined by aberrant stimulation of inflammatory pathways without involving antigen-directed autoimmunity. They may be divided into monogenic and polygenic types. Monogenic autoinflammatory syndromes are those with identified genetic mutations, such as familial Mediterranean fever, tumor necrosis factor receptor-associated periodic fever syndrome (TRAPS), mevalonate kinase deficiency or hyperimmunoglobulin D syndrome, cryopyrin-associated periodic fever syndromes (CAPS), pyogenic arthritis pyoderma gangrenosum and acne (PAPA) syndrome, interleukin-10 and interleukin-10 receptor deficiencies, adenosine deaminase 2 deficiency and pediatric sarcoidosis. Those without an identified genetic mutation are known as polygenic and include systemic-onset juvenile idiopathic arthritis, idiopathic recurrent acute pericarditis, Behçet syndrome, chronic recurrent multifocal osteomyelitis and inflammatory bowel disease among others. Autoinflammatory disorders are defined by repeating episodes or persistent fever, rash, serositis, lymphadenopathy, arthritis and increased acute phase reactants, and thus may mimic infections clinically. Most monogenic autoinflammatory syndromes present in childhood. However, because of their infrequency, diverse and nonspecific presentation, and the relatively new genetic recognition, diagnosis is usually delayed. In this article, which is Part 1 of a two-part series, the authors update monogenic autoinflammatory diseases in children with special emphasis on imaging features that may help establish the correct diagnosis.

  相似文献   
9.
10.
ObjectivesThis study aimed to assess medication use in pregnant women in Malaysia by measuring use, knowledge, awareness, and beliefs about medications.MethodsThis was an observational, cross-sectional study involving a total of 447 pregnant women who attended the Obstetrics and Gynecology Clinic, Hospital Kuala Lumpur (HKL), Malaysia. A validated, self-administered questionnaire was used to collect participant data.ResultsMost of pregnant women had taken medication during pregnancy and more than half of them (52.8%) showed a poor level of knowledge about the medication use during pregnancy. Eighty-three percent had a poor level of awareness and 56.5% had negative beliefs. Age and education level were significantly associated with the level of knowledge regarding medication use during pregnancy. Multiparous pregnant women, and pregnant women from rural areas were observed to have a higher level of awareness compared with those who lived in urban areas. Use of medication during pregnancy was determined to be significantly associated with education level, and race.ConclusionAlthough there was prevalent use of medication among pregnant women, many had negative beliefs, and insufficient knowledge and awareness about the risks of taking medication during pregnancy. Several sociodemographic characteristics were significantly associated with the use (race and education level), level of knowledge (age and education level), awareness (parity and place of residence), and beliefs (race, education level, and occupation status) towards medication use during pregnancy.  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