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   11873篇
  免费   791篇
  国内免费   216篇
耳鼻咽喉   567篇
儿科学   110篇
妇产科学   91篇
基础医学   2063篇
口腔科学   1291篇
临床医学   807篇
内科学   899篇
皮肤病学   240篇
神经病学   512篇
特种医学   545篇
外国民族医学   4篇
外科学   1166篇
综合类   1471篇
预防医学   211篇
眼科学   1286篇
药学   602篇
  7篇
中国医学   273篇
肿瘤学   735篇
  2024年   11篇
  2023年   140篇
  2022年   219篇
  2021年   348篇
  2020年   350篇
  2019年   323篇
  2018年   331篇
  2017年   324篇
  2016年   330篇
  2015年   363篇
  2014年   618篇
  2013年   655篇
  2012年   591篇
  2011年   594篇
  2010年   612篇
  2009年   529篇
  2008年   536篇
  2007年   535篇
  2006年   497篇
  2005年   464篇
  2004年   414篇
  2003年   373篇
  2002年   304篇
  2001年   307篇
  2000年   256篇
  1999年   252篇
  1998年   195篇
  1997年   204篇
  1996年   206篇
  1995年   176篇
  1994年   168篇
  1993年   162篇
  1992年   148篇
  1991年   147篇
  1990年   124篇
  1989年   133篇
  1988年   107篇
  1987年   83篇
  1986年   92篇
  1985年   91篇
  1984年   104篇
  1983年   46篇
  1982年   74篇
  1981年   76篇
  1980年   69篇
  1979年   41篇
  1978年   43篇
  1977年   28篇
  1976年   27篇
  1975年   22篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
IntroductionThere are no previously described training models for learning or teaching how to remove lithiasis from the salivary ducts. Therefore, we present a new simulation model to enable us to faithfully represent the process of endoscopic lithiasis extraction by sialoendoscopy.Materials and methodsA simulation model was developed using a pig's head, omeprazole spheres were used to simulate lithiasis in the various ducts of each salivary gland and a Dormia basket was used to train in extraction of the lithiasis model.ResultsTwenty-seven residents in training and/or young specialists were successfully trained in this technique using this model. Twenty-six (96.3%) considered the model useful for training in the use of baskets; all of them were able to capture the omeprazole sphere in the salivary duct. A satisfaction rate of 92.25 out of 100 points was obtained through an anonymous survey.ConclusionWe describe a novel simulation model using omeprazole spheres, which allows the surgeon to practice how to diagnose and treat obstructive pathology of the salivary glands in a risk-free environment guaranteeing the reproducibility of the technique in conditions similar to those of normal practice.  相似文献   
4.
5.
6.

Purpose

To evaluate the efficacy and safety of intense pulsed light (IPL) combined with meibomian gland expression (MGX) for treatment of refractory meibomian gland dysfunction (MGD).

Methods

Ninety eyes of 45 patients were randomly assigned to receive either the combination of IPL and MGX or MGX alone (control). Each eye underwent eight treatment sessions at 3-week intervals. Parameters were evaluated before and during treatment as well as at 3–11 weeks after the last treatment session. Measured parameters included the Standard Patient Evaluation of Eye Dryness (SPEED) questionnaire score, noninvasive breakup time (NIBUT), fluorescein breakup time (BUT), lipid layer grade, lipid layer thickness (LLT), lid margin abnormalities, corneal and conjunctival fluorescein staining (CFS) score, meibum grade, and meiboscore.

Results

A significant improvement in lipid layer grade was apparent in the IPL-MGX group from 6 to 32 weeks after treatment onset (adjusted P?<?0.001) but was not observed in the control group. The IPL-MGX group also showed significant improvements in LLT, NIBUT, BUT, lid margin abnormalities, and meibum grade compared with the control group at 24 and 32 weeks (adjusted P?<?0.001) as well as significant improvements in the SPEED score at 32 weeks (adjusted P?=?0.044) and in CFS score at 24 (adjusted P?=?0.015) and 32 (adjusted P?=?0.006) weeks.

Conclusions

The combination of IPL and MGX improved homeostasis of the tear film and ameliorated ocular symptoms in patients with refractory MGD and is thus a promising modality for treatment of this condition.  相似文献   
7.
8.
BackgroundThe Journal of Oral Biosciences is devoted to advancing and disseminating fundamental knowledge concerning every aspect of oral biosciences.HighlightThis review features review articles in the fields of “Extracellular Vesicles,” “Propolis,” “Odontogenic Tumors,” “Periodontitis,” “Periodontium,” “Flavonoids,” “Lactoferrin,” “Dental Plaque,” “Anatomy,” “Induced Pluripotent Stem Cells,” “Bone Cell Biology,” “Dysgeusia,” “Dental Caries,” and “Dental Pulp Cavity,” in addition to the review article by the winners of the “Lion Award” (“Sox9 function in salivary gland development”) presented by the Japanese Association for Oral Biology.ConclusionThese reviews in the Journal of Oral Biosciences have inspired its readers to broaden their knowledge regarding various aspects of oral biosciences. The current editorial review introduces these exciting review articles.  相似文献   
9.
The diagnosis and treatment of deep lobe parotid tumours is challenging because of the complex surgical accessibility. There is a lack of studies describing the differences between deep lobe tumours that do and do not occupy the parapharyngeal space (PPS). Patients treated for deep lobe tumours occupying the PPS (PPS group) and not occupying the PPS (non-PPS group) were analysed retrospectively. A total of 227 patients were treated surgically for deep lobe parotid tumours between 1990 and 2019. Sixty patients (26.4%) presented with tumours that involved the PPS (PPS group), while 167 (73.6%) presented with tumours that did not occupy the PPS (non-PPS group). The majority of the PPS group tumours were removed using a transcervical or transcervical–transparotid approach. PPS group tumours were larger (P < 0.001), and tumour spill occurred more frequently in this group (benign tumours: P = 0.002; malignant tumours: P = 0.033). Complication rates did not differ between the PPS and non-PPS groups. A transcervical or transcervical–transparotid approach is the preferred method for the management of deep lobe parotid tumours that occupy the PPS in our practice. Tumour spill occurred more frequently in the PPS group, which is most probably due to the larger tumour size and more complex accessibility.  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