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   221919篇
  免费   17584篇
  国内免费   7107篇
耳鼻咽喉   1327篇
儿科学   7738篇
妇产科学   1581篇
基础医学   19597篇
口腔科学   3827篇
临床医学   23470篇
内科学   56030篇
皮肤病学   2726篇
神经病学   26203篇
特种医学   6382篇
外国民族医学   4篇
外科学   17115篇
综合类   30340篇
现状与发展   31篇
一般理论   9篇
预防医学   18031篇
眼科学   2441篇
药学   15643篇
  187篇
中国医学   10098篇
肿瘤学   3830篇
  2024年   534篇
  2023年   4410篇
  2022年   7685篇
  2021年   11932篇
  2020年   11038篇
  2019年   8432篇
  2018年   8353篇
  2017年   8269篇
  2016年   8598篇
  2015年   8302篇
  2014年   15755篇
  2013年   17196篇
  2012年   12894篇
  2011年   13956篇
  2010年   11003篇
  2009年   10579篇
  2008年   10580篇
  2007年   10260篇
  2006年   9127篇
  2005年   7532篇
  2004年   6420篇
  2003年   5502篇
  2002年   4655篇
  2001年   4007篇
  2000年   3333篇
  1999年   2868篇
  1998年   2736篇
  1997年   2421篇
  1996年   2158篇
  1995年   1964篇
  1994年   1799篇
  1993年   1541篇
  1992年   1477篇
  1991年   1299篇
  1990年   1023篇
  1989年   875篇
  1988年   819篇
  1987年   746篇
  1986年   643篇
  1985年   749篇
  1984年   628篇
  1983年   389篇
  1982年   460篇
  1981年   386篇
  1980年   287篇
  1979年   248篇
  1978年   193篇
  1977年   170篇
  1976年   136篇
  1974年   51篇
排序方式: 共有10000条查询结果,搜索用时 171 毫秒
11.
12.
姚海艳  史珣瑜  施江 《全科护理》2021,19(4):566-569
目的:探讨经皮冠状动脉介入(PCI)术后病人的体力活动水平及其影响因素。方法:选择常州市三级甲等综合医院心内科接受PCI治疗的冠心病病人,收集资料,分析PCI术后冠心病病人体力活动动机、体力活动和自我效能现状;冠心病病人自我效能、体力活动动机与体力活动的相关性,并分析影响PCI术后病人体力活动水平的相关危险因素。结果:共发放调查问卷400份,回收400份,有效率为94.75%(379/400);379例冠心病病人术后每周体力活动为(3570.85±314.19)MET-min,以低、中强度为主;冠心病病人术后自我效能总分、体力活动动机总分与体力活动呈正相关(P<0.05);体质指数(BMI)、PCI次数≥2次、年龄、PCI支架数量≥3枚、自我效能、体力活动动机是影响PCI术后冠心病病人体力活动水平的高危因素(OR>1且P<0.05)。结论:PCI术后病人体力活动水平处于较低的水平,PCI次数、BMI、年龄、PCI支架数量、自我效能、体力活动动机是影响PCI术后冠心病病人体力活动水平的高危因素,临床需针对各高危因素制定相应的干预措施,提高病人体力活动水平。  相似文献   
13.
The coronavirus disease 2019 (COVID-19) pandemic has rapidly created widespread impacts on global health and the economy. Data suggest that women are less susceptible to severe illness. However, sex-disaggregated data are incomplete, leaving room for misinterpretation, and focusing only on biologic sex underestimates the gendered impact of the pandemic on women. This narrative review summarizes what is known about gender disparities during the COVID-19 pandemic and the economic, domestic, and health burdens along with overlapping vulnerabilities related to the pandemic. In addition, this review outlines recommended strategies that advocacy groups, community leaders, and policymakers should implement to mitigate the widening gender disparities related to COVID-19.  相似文献   
14.
15.
The coronavirus 2019 pandemic has affected almost every aspect of health care delivery in the United States, and the emergency medicine system has been hit particularly hard while dealing with this public health crisis. In an unprecedented time in our history, medical systems and clinicians have been asked to be creative, flexible, and innovative, all while continuing to uphold the important standards in the US health care system. To continue providing quality services to patients during this extraordinary time, care providers, organizations, administrators, and insurers have needed to alter longstanding models and procedures to respond to the dynamics of a pandemic. The Emergency Medicine Treatment and Active Labor Act of 1986, or EMTALA, is 1 example of where these alterations have allowed health care facilities and clinicians to continue their work of caring for patients while protecting both the patients and the clinicians themselves from infectious exposures at the same time.  相似文献   
16.
胆囊切除术是公认的胆囊良性疾病的治愈手段,国内外学术界对于手术适应证和手术时机已有明确共识。近年来,“保胆手术”治疗胆囊良性疾病颇受热议,一些医生将“保护胆囊”的学术观点等同于“保留胆囊”的手术技术,这种误解可能导致病人出现差异性的预后。因此,临床医师应明晰“保护胆囊”理念与“保胆手术”的差别,对胆囊良性疾病的诊疗原则有正确的理解和应用。  相似文献   
17.
Inflammatory bowel disease (IBD) is a chronic disease that requires chronic treatment throughout the evolution of the disease, with a complex physiopathology that entails great challenges for the development of new and specific treatments for ulcerative colitis and Crohn´s disease. The anti-tumor necrosis factor alpha therapy has impacted the clinical course of IBD in those patients who do not respond to conventional treatment, so there is a need to develop new therapies and markers of treatment response. Various pathways involved in the development of the disease are known and the new therapies have focused on blocking the inflammatory process at the gastrointestinal level by oral, intravenous, subcutaneous, and topical route. All these new therapies can lead to more personalized treatments with higher success rates and fewer relapses. These treatments have not only focused on clinical remission, but also on achieving macroscopic changes at the endoscopic level and microscopic changes by achieving mucosal healing. These treatments are mainly based on modifying signaling pathways, by blocking receptors or ligands, reducing cell migration and maintaining the integrity of the epithelial barrier. Therefore, this review presents the efficacy and safety of the new treatments that are currently under study and the advances that have been made in this area in recent years.  相似文献   
18.
19.
20.
PurposeTo review and to compare indirectly the outcomes of minimally invasive therapies for the treatment of lower urinary tract symptoms secondary to benign prostatic hyperplasia.Materials and MethodsA literature search via Medline and Cochrane Central databases was completed for randomized control studies published between January 2000 to April 2020 for the following therapies: Rezum, Urolift, Aquablation, and prostatic artery embolization (PAE). Data on the following variables were included: International prostate symptom score (IPSS), maximum urinary flow rate, quality of life, and postvoid residual (PVR). Standard mean differences between treatments were compared through a meta-analysis using transurethral resection of the prostate (TURP) to assess differences in treatment effect.ResultsThere was no significant difference in outcomes between therapies for IPSS at the 3, 6, and 12-month follow ups. Although outcomes for Rezum were only available out to 3 months, there were no consistently significant differences in outcomes when comparing Aquablation versus PAE versus Rezum. TURP PVR was significantly better than Urolift at 3, 6, and 12 months. No significant differences in minor or major adverse events were noted.ConclusionAlthough significant differences in outcomes were limited, Aquablation and PAE were the most durable at 12 months. PAE has been well studied on multiple randomized control trials with minimal adverse events while Aquablation has limited high quality data and has been associated with bleeding-related complications.  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