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   72544篇
  免费   6696篇
  国内免费   2144篇
耳鼻咽喉   664篇
儿科学   1401篇
妇产科学   2288篇
基础医学   11919篇
口腔科学   1442篇
临床医学   7442篇
内科学   11523篇
皮肤病学   2104篇
神经病学   2931篇
特种医学   2372篇
外国民族医学   7篇
外科学   8145篇
综合类   7922篇
现状与发展   9篇
一般理论   7篇
预防医学   5715篇
眼科学   620篇
药学   5977篇
  40篇
中国医学   1143篇
肿瘤学   7713篇
  2024年   130篇
  2023年   1206篇
  2022年   2202篇
  2021年   2871篇
  2020年   2992篇
  2019年   2887篇
  2018年   2700篇
  2017年   2773篇
  2016年   3081篇
  2015年   3122篇
  2014年   4670篇
  2013年   5460篇
  2012年   3955篇
  2011年   4317篇
  2010年   3503篇
  2009年   3361篇
  2008年   3228篇
  2007年   3147篇
  2006年   2918篇
  2005年   2605篇
  2004年   2388篇
  2003年   2188篇
  2002年   1909篇
  2001年   1655篇
  2000年   1448篇
  1999年   1208篇
  1998年   1104篇
  1997年   967篇
  1996年   880篇
  1995年   791篇
  1994年   796篇
  1993年   599篇
  1992年   648篇
  1991年   475篇
  1990年   430篇
  1989年   379篇
  1988年   359篇
  1987年   246篇
  1986年   238篇
  1985年   338篇
  1984年   277篇
  1983年   134篇
  1982年   139篇
  1981年   154篇
  1980年   150篇
  1979年   108篇
  1978年   81篇
  1977年   53篇
  1976年   54篇
  1975年   20篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
51.
52.
A survey of mycology laboratories for antifungal susceptibility testing (AFST) was undertaken in France in 2018, to better understand the difference in practices between the participating centers and to identify the difficulties they may encounter as well as eventual gaps with published standards and guidelines. The survey captured information from 45 mycology laboratories in France on how they perform AFST (number of strains tested, preferred method, technical and quality aspects, interpretation of the MIC values, reading and interpretation difficulties). Results indicated that 86% of respondents used Etest as AFST method, with a combination of one to seven antifungal agents tested. Most of the participating laboratories used similar technical parameters to perform their AFST method and a large majority used, as recommended, internal and external quality assessments. Almost all the participating mycology laboratories (98%) reported difficulties to interpret the MIC values, especially when no clinical breakpoints are available. The survey highlighted that the current AFST practices in France need homogenization, particularly for MIC reading and interpretation.  相似文献   
53.
54.
A review of the literature was performed to explore the association between prenatal education and rates of primary cesarean birth for women at low risk for cesarean birth. Most women who are nulliparous with a singleton fetus of term gestational age and in the vertex position are considered to be at low risk and favorable for a vaginal birth, yet the cesarean birth rate for women at low risk was 25.6% in 2019. It has been suggested that the rise in the cesarean birth rate among low-risk women may not be due to medical indications but, rather, to nonmedical factors, such as a provider’s or woman’s preference or lack of prenatal education. Evidence from this literature review supports the premise that prenatal education classes should be routinely incorporated into maternity care in an effort to reduce cesarean birth rates for the low-risk population.  相似文献   
55.
56.
Acute generalized exanthematous pustulosis (AGEP) is seen uncommonly in children and sometimes shows atypical clinical features in this population. Patch testing can be used effectively in children for the confirmation of the culprit drug in cases of multiple drug use. Here, we report a rare, pediatric case of ceftriaxone‐induced AGEP confirmed by patch testing with subsequent recurrence of the skin eruption.  相似文献   
57.
随着科学技术的进步和对疾病本身认识的深入,直肠癌的外科治疗从局部切除到全直肠系膜切除(TME),从开放手术到腹腔镜手术,再从腹腔镜手术到机器人手术,目前已经进入微创时代。在此时代背景下,经肛门全直肠系膜切除(TaTME) 应运而生。正如TME的提出者Heald所言:“TaTME是近30年直肠癌外科治疗技术的集大成者”,其发展的每一个阶段都有很强的代表性,已成为直肠癌微创外科治疗技术进步发展的一个缩影。  相似文献   
58.
59.
Sometimes the clinical differentiation between verruca plana (VP) and VP‐like seborrheic keratosis (SK) could be challenged. However, there have been no studies on this issue to date. The aim of this study was to elucidate clinical and dermoscopic differences between these two diseases, and also to suggest a diagnostic algorithm of VP and VP‐like SK without skin biopsy. The patients who had lesions clinically considered as VP or VP‐like SK were the target of our study. We took clinical and dermoscopic photos with informed consent and conducted a questionnaire. All patients had their diagnoses confirmed by biopsy. Thirty‐three patients were enrolled in our study. Seventeen patients were finally diagnosed with VP (51.5%) and 16 patients with VP‐like SK (48.5%). In clinical findings, VP‐like SK showed significantly more scattered distribution than VP (P = 0.039), which exhibited more clustered or grouped distribution (P = 0.039). In dermoscopic findings, brain‐like appearance was more commonly observed in VP‐like SK (P = 0.003) whereas VP showed more red dots or globular vessels (P = 0.017) and even‐colored light brown to yellow patch (P < 0.001). Sex, onset age, the size of each lesion, location, color and shape showed no significant differences between them (P > 0.05). Based on our results, we suggest a diagnostic algorithm using Koebner's phenomenon, dermoscopic findings, distribution of each lesion and biopsy for multiple VP‐like lesions in adults, and we think it will be a very useful diagnostic tool in daily clinical dermatological practice.  相似文献   
60.
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