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   11688篇
  免费   739篇
  国内免费   211篇
耳鼻咽喉   671篇
儿科学   120篇
妇产科学   91篇
基础医学   2070篇
口腔科学   1399篇
临床医学   834篇
内科学   898篇
皮肤病学   240篇
神经病学   517篇
特种医学   598篇
外国民族医学   4篇
外科学   1203篇
综合类   1438篇
现状与发展   1篇
预防医学   207篇
眼科学   671篇
药学   610篇
  8篇
中国医学   266篇
肿瘤学   792篇
  2024年   11篇
  2023年   123篇
  2022年   223篇
  2021年   352篇
  2020年   334篇
  2019年   307篇
  2018年   330篇
  2017年   316篇
  2016年   316篇
  2015年   353篇
  2014年   597篇
  2013年   596篇
  2012年   588篇
  2011年   593篇
  2010年   583篇
  2009年   542篇
  2008年   546篇
  2007年   520篇
  2006年   489篇
  2005年   440篇
  2004年   400篇
  2003年   366篇
  2002年   294篇
  2001年   302篇
  2000年   251篇
  1999年   258篇
  1998年   192篇
  1997年   204篇
  1996年   207篇
  1995年   179篇
  1994年   167篇
  1993年   161篇
  1992年   144篇
  1991年   149篇
  1990年   123篇
  1989年   134篇
  1988年   105篇
  1987年   84篇
  1986年   91篇
  1985年   92篇
  1984年   101篇
  1983年   44篇
  1982年   73篇
  1981年   77篇
  1980年   70篇
  1979年   43篇
  1978年   42篇
  1977年   31篇
  1976年   29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