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   364815篇
  免费   32546篇
  国内免费   9960篇
耳鼻咽喉   4115篇
儿科学   7045篇
妇产科学   5284篇
基础医学   42616篇
口腔科学   10645篇
临床医学   29517篇
内科学   46077篇
皮肤病学   5032篇
神经病学   25342篇
特种医学   9335篇
外国民族医学   43篇
外科学   31641篇
综合类   51389篇
现状与发展   30篇
一般理论   24篇
预防医学   36599篇
眼科学   3544篇
药学   44124篇
  376篇
中国医学   33075篇
肿瘤学   21468篇
  2024年   1341篇
  2023年   6892篇
  2022年   14142篇
  2021年   17425篇
  2020年   15908篇
  2019年   17085篇
  2018年   15662篇
  2017年   14302篇
  2016年   13221篇
  2015年   13344篇
  2014年   23270篇
  2013年   24241篇
  2012年   21098篇
  2011年   23534篇
  2010年   18808篇
  2009年   17369篇
  2008年   16571篇
  2007年   15762篇
  2006年   13602篇
  2005年   11879篇
  2004年   10120篇
  2003年   8894篇
  2002年   6995篇
  2001年   5785篇
  2000年   5139篇
  1999年   4416篇
  1998年   3816篇
  1997年   3617篇
  1996年   3096篇
  1995年   2908篇
  1994年   2673篇
  1993年   2372篇
  1992年   1994篇
  1991年   1832篇
  1990年   1602篇
  1989年   1457篇
  1988年   1382篇
  1987年   1262篇
  1986年   1317篇
  1985年   2879篇
  1984年   3073篇
  1983年   2105篇
  1982年   2590篇
  1981年   1914篇
  1980年   1698篇
  1979年   1463篇
  1978年   1140篇
  1977年   870篇
  1976年   1043篇
  1975年   716篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
53.
目的 解析真实世界中乳腺恶性肿瘤患者的人群特征、诊断特征、中西医用药特征,为乳腺癌的临床防治提供参考。方法 采集2002年2月至2015年5月全国60家三级甲等医 院信息系统(Hospital Information System,HIS)中,出院诊断为“乳腺癌”的患者用药信息,采用SAS9.3统计软件,对人口学信息、诊断信息、医嘱用药信息等进行描述性分析。结果 39798例乳腺癌患者,平均年龄(50.93者,平均年龄)岁;多以门诊入院,入院病情以“一般”为主;合并疾病主要为高血压,骨肿瘤,联用西药以抑制肿瘤细胞增殖、治疗并发症、缓解放化疗不良反应为主;中医辨证以痰瘀互结证,气阴两虚证,肝气淤滞证,脾气亏虚证型最为常见,临床清热解毒剂、益气扶正剂,活血化瘀剂应用较多。结论 乳腺癌中西医结合治疗,联用药物广泛,临床治疗基本符合临床指南。  相似文献   
54.
Abstract

This study is a single-center, retrospective analysis of postmenopausal women presenting with dyspareunia and vulvar pain, aiming to evaluate relative effectiveness of vestibular CO2 laser therapy as a treatment. Three monthly sessions of laser were performed to each patient and thereafter a three-months follow-up was stablished. A total number of 72 patients undergoing vestibular laser treatment were recruited from patient files in the period between 2016 and 2018. Among these, 39 women also received a concomitant treatment with ospemifene (60?mg/day) during the study period. There was a statistically significant reduction of all the symptoms in both groups up to the three month follow-up. Regarding dryness and dyspareunia, the relief tent to be more prominent in the ospemifene?+?laser group at all follow-ups and remained statistically significant at three-month follow-up. Specifically, vestibular dryness was significantly lower in the ospemifene?+?laser group compared with the laser treatment group (?87% vs???34%, respectively), and the vestibular health score started declining faster in the ospemifene?+?laser group. Although, additional research is needed to understand the mechanism of action, our data shows that a combination regimen of laser and ospemifene may improve clinical effectiveness for long-term treatment of symptoms associated with the under-recognized genitourinary syndrome of menopause.  相似文献   
55.
56.
57.
BackgroundBurnout in teachers has been linked to decreased effectiveness as educators, and suboptimal interactions with students. The purpose of this pilot study was to assess the outcomes of a brief Stress Management and Resiliency Training (SMART) program for public school staff.Materials and methodsThis single-arm, prospective trial involved an investigation of the effects of a brief SMART program on participant stress, anxiety, resilience, gratitude, happiness, life satisfaction, and quality of life (QOL).ResultsSignificant improvements were noted in participant anxiety (P < 0.001), stress (P = 0.003), gratitude (P = 0.001), happiness (P < 0.001), life satisfaction (P < 0.001), and QOL (P < 0.001). Most participants reported that the skills learned positively affected interactions with students (77.2%) and coworkers (72.2%).ConclusionsThe SMART program showed promising effectiveness for improving anxiety, stress, gratitude, happiness, life satisfaction and QOL. Given the prevalence and impact of teacher burnout, larger, controlled trials and broader dissemination of the intervention are warranted.  相似文献   
58.
59.
目的:调查研究不同海拔高度官兵的亚健康状态。方法抽取4种海拔(1500、3700、5380、5390 m)的高原边防和后勤官兵共344名,进行康奈尔健康量表测评。测评结果建立数据库,用SPSS 17.0进行数据分析,测量相关数据的前后变化。结果数据结果显示不同海拔高度的官兵健康状况随海拔高度的变化存在差异,而高原边防和后勤官兵的整体健康状况差异不大。结论高原官兵要改善亚健康状态,应该从思想教育,心理调整和保障制度等多方面着手,切实保障官兵健康和提高部队战斗力。  相似文献   
60.
Mammalian spermatogenesis is a well-organized process of cell development and differentiation. Meiosis expressed gene 1 (MEIG1) plays an essential role in the regulation of spermiogenesis. To explore potential mechanisms of MEIG1''s action, a yeast two-hybrid screen was conducted, and several potential binding partners were identified; one of them was membrane occupation and recognition nexus repeat containing 3 (MORN3). MORN3 mRNA is only abundant in mouse testis. In the testis, Morn3 mRNA is highly expressed in the spermiogenesis stage. Specific anti-MORN3 polyclonal antibody was generated against N-terminus of the full-length MORN3 protein, and MORN3 expression and localization was examined in vitro and in vivo. In transfected Chinese hamster ovary cells, the antibody specifically crossed-reacted the full-length MORN3 protein, and immunofluorescence staining revealed that MORN3 was localized throughout the cytoplasm. Among multiple mouse tissues, about 25 kDa protein, was identified only in the testis. The protein was highly expressed after day 20 of birth. Immunofluorescence staining on mixed testicular cells isolated from adult wild-type mice demonstrated that MORN3 was expressed in the acrosome in germ cells throughout spermiogenesis. The protein was also present in the manchette of elongating spermatids. The total MORN3 expression and acrosome localization were not changed in the Meig 1-deficient mice. However, its expression in manchette was dramatically reduced in the mutant mice. Our studies suggest that MORN3 is another regulator for spermatogenesis, probably together with MEIG1.  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