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   629篇
  免费   34篇
  国内免费   4篇
耳鼻咽喉   7篇
儿科学   18篇
妇产科学   15篇
基础医学   101篇
口腔科学   12篇
临床医学   44篇
内科学   131篇
皮肤病学   6篇
神经病学   42篇
特种医学   34篇
外科学   69篇
综合类   7篇
一般理论   2篇
预防医学   94篇
眼科学   21篇
药学   33篇
中国医学   4篇
肿瘤学   27篇
  2024年   1篇
  2023年   6篇
  2022年   8篇
  2021年   27篇
  2020年   14篇
  2019年   37篇
  2018年   25篇
  2017年   18篇
  2016年   18篇
  2015年   26篇
  2014年   25篇
  2013年   29篇
  2012年   39篇
  2011年   38篇
  2010年   37篇
  2009年   29篇
  2008年   36篇
  2007年   46篇
  2006年   42篇
  2005年   35篇
  2004年   22篇
  2003年   24篇
  2002年   17篇
  2001年   8篇
  2000年   13篇
  1999年   11篇
  1998年   2篇
  1997年   2篇
  1995年   2篇
  1994年   1篇
  1993年   1篇
  1992年   3篇
  1991年   6篇
  1990年   4篇
  1989年   1篇
  1988年   1篇
  1987年   4篇
  1986年   1篇
  1983年   1篇
  1982年   1篇
  1981年   3篇
  1972年   3篇
排序方式: 共有667条查询结果,搜索用时 234 毫秒
1.
2.
This study reports the genetic characteristics of coxsackievirus A24 isolates from Tunisia, including a coxsackievirus A24 variant (CVA24v) that caused an outbreak of acute haemorrhagic conjunctivitis (AHC) between September and November 2003. The virus genome was detected by PCR from conjunctival swabs obtained from patients with AHC. Four virus isolates were obtained from PCR-positive samples and were serotyped by sequence analysis of the VP1 and VP4 genomic region and by seroneutralisation. Phylogenetic analysis of the VP1, VP4 and 3C genomic regions was performed. Other Tunisian CVA24 isolates from paralytic cases and healthy individuals were also amplified, sequenced and included in the phylogenetic analysis. The epidemic strain belonged to the CVA24 serotype. Phylogenetic analysis of the 3C region of the genome revealed a strong relationship between the Tunisian epidemic strain and strains that caused outbreaks in Korea (2002) and Guadeloupe and French Guiana (2003). Phylogenetic analysis of the VP1 and VP4 regions showed a clear distinction between serotype CVA24 isolates from conjunctivitis and non-conjunctivitis cases. This is the first study to report an outbreak of AHC caused by CVA24v in the North African region.  相似文献   
3.
BackgroundTo perform the citation and content analysis of 100 articles on Hallux valgus from the most cited to the least.Materials and methodsArticles published on Hallux valgus between 1980 and 2020 were analyzed by making use of the Web of Science database. Articles were ranked from most cited to the least. Content analysis of all articles was also carried out. Original research articles, reviews, and clinical trials were included in the study whereas case reports were excluded from the study.ResultsThe total number of citations of the 100 most-cited articles was 7,697. The most-cited article was ‘Prevalence of hallux valgus in the general population; systematic review and meta-analysis’ published by Sheere Nix in Journal of Foot and Ankle Research in 2010. The country where the articles were mostly produced was USA (n = 46). The most interesting issue was the osteotomy techniques and changes in Hallux valgus surgery.ConclusionThe treatment of the Hallux valgus disease is still discussed today. Citation analyses have shown that surgical developments related to HV surgery still attract attention, and this information will be updated continuously in line with the increasing number of articles.  相似文献   
4.
Quality of Life Research - (1) To develop a personalized health outcome profile as a feedback tool to improve self-management in people living with chronic conditions such as HIV and (2) to...  相似文献   
5.
The aim of this study was to evaluate the change of breast density in the normal breast of patients receiving neoadjuvant chemotherapy (NAC). Forty‐four breast cancer patients were studied. MRI acquisition was performed before treatment (baseline), and 4 and 12 weeks after treatment. A computer‐algorithm‐based program was used to segment breast tissue and calculate breast volume (BV), fibroglandular tissue volume (FV), and percent density (PD) (the ratio of FV over BV × 100%). The reduction of FV and PD after treatment was compared with baseline using paired t‐tests with a Bonferroni–Holm correction. The association of density reduction with age was analyzed. FV and PD after NAC showed significant decreases compared with the baseline. FV was 110.0 ml (67.2, 189.8) (geometric mean (interquartile range)) at baseline, 104.3 ml (66.6, 164.4) after 4 weeks (p < 0.0001), and 94.7 ml (60.2, 144.4) after 12 weeks (comparison with baseline, p < 0.0001; comparison with 4 weeks, p = 0.016). PD was 11.2% (6.4, 22.4) at baseline, 10.6% (6.6, 20.3) after 4 weeks (p < 0.0001), and 9.7% (6.2, 17.9) after 12 weeks (comparison with baseline, p = 0.0001; comparison with 4 weeks, p = 0.018). Younger patients tended to show a higher density reduction, but overall correlation with age was only moderate (r = 0.28 for FV, p = 0.07, and r = 0.52 for PD, p = 0.0003). Our study showed that breast density measured from MR images acquired at 3T MR can be accurately quantified using a robust computer‐aided algorithm based on non‐parametric non‐uniformity normalization (N3) and an adaptive fuzzy C‐means algorithm. Similar to doxorubicin and cyclophosphamide regimens, the taxane‐based NAC regimen also caused density atrophy in the normal breast and showed reduction in FV and PD. The effect of breast density reduction was age related and duration related. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   
6.
7.
ObjectivesThe presence of a wide variety of autoantibodies is a characteristic feature of systemic lupus erythematosus (SLE). Although non-specific, anti-complement C1q (anti-C1q) were shown to correlate with the occurrence of active nephritis. The present study aimed to investigate the prevalence of anti-C1q in Tunisian SLE patients and their association with clinical manifestations, especially renal involvement.Patients and methodsIgG anti-C1q antibodies were assessed by Elisa in 98 SLE patients, 55 patients with rheumatoid arthritis (RA) and 65 healthy individuals (HI).ResultsAnti-C1q were found in 53 (54.1%) patients with SLE, three (5%) patients with RA and six (9.3%) HI. Among the 65 patients with renal involvement, anti-C1q were present in 35 (53.8%) patients. There was no significant association between anti-C1q and renal or extrarenal manifestations. In addition, there was no correlation between anti-C1q titer and SLEDAI index. Anti-C1q were significantly associated with anti-nucleosome (P = 0.001), anti-Sm (P = 0.01) and a low C4 level (P = 0.046). Concomitant presence of anti-C1q and anti-dsDNA antibodies was not associated with renal manifestations.ConclusionOur study shows that prevalence of anti-C1q was comparable with that previously reported in Caucasian populations. These antibodies were associated with a low C4 level. However, there was no association between anti-C1q and renal involvement or severity of nephritis.  相似文献   
8.
BackgroundThe coexistence of supracondylar humerus fracture and forearm fracture is a rare trauma (3–13%) and it is called floating elbow. The aim of this study is to clinically compare the treatment outcomes of the patients diagnosed with floating elbow who underwent surgical treatment and who were followed up forearm with immobilization with splint.Materials and MethodsWhen scanned retrospectively, 60 patients who were treated with the diagnosis of floating elbow due to traumatic causes and followed up for at least 1 year were included in our study. Surgical treatment was performed on 42 patients for forearm fracture. Eighteen patients followed up with immobilization with a long arm splint. The results were evaluated according to the criteria modified by Templeton and Graham, in comparison with the patient’s intact side.ResultsIn the patients whose forearms were followed up conservatively, the mean age was 5.67 ± 2.25 years, and the mean follow-up period was 62.17 ± 45.91 months. In the patients who underwent surgery for the forearm, the mean age was 8.79 ± 2.01 years, and the mean follow-up was 47.14 ± 34.25 months. Eighteen patients whose forearms followed up conservatively, 12 had excellent and good clinical results and 6 had poor and moderate clinical results. Excellent and good clinical results in 27 patients who underwent surgical treatment for their forearms, moderate and poor clinical results obtained in 15 of them. There was no significant difference between the two groups (p = 0.357).ConclusionsIn conclusion, satisfactory clinical and radiological outcomes can be obtained with immobilization of the forearm fracture with splint, if acceptable reduction can be provided for the forearm following fixation of the supracondylar humerus fracture with the K-wire for treatment of floating elbow injury.  相似文献   
9.
Non-medical approaches including cognitive behavioral therapy (CBT) have been proposed for the management of tocophobia. A new method of performing CBT is through internet. The aim of this systematic review and meta-analysis was to evaluate the effect of internet-based and traditional CBT on tocophobia. A literature search was conducted on qualitative and quantitative articles from 2000 to 2019 in Pubmed, Scopus, Web of Science and Cochrane databases using search terms referring to tocophobia and CBT. Identified articles were screened in two steps; 1) title and abstract and 2) full text screening. The quality of the quantitative and qualitative studies was assessed using the quality criteria proposed by the Cochrane Collaboration and Jonna Briggs Institute (JBI) checklist respectively. Out of the 382 relevant studies, 9 studies were eligible for the review. A high level of heterogeneity was observed in the studies (I2 = 94%, P < 0.001). The meta-analysis showed that both internet-based, and traditional CBT were effective in reducing tocophobia. CBT was more effective in interventions in the Middle Eastern compared to European countries. More than five CBT sessions could significantly reduce tocophobia. Healthcare providers and midwives should have basic knowledge on physiological interventions to reduce tocophobia.  相似文献   
10.
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