全文获取类型
收费全文 | 83444篇 |
免费 | 3663篇 |
国内免费 | 3245篇 |
专业分类
耳鼻咽喉 | 490篇 |
儿科学 | 1870篇 |
妇产科学 | 2190篇 |
基础医学 | 6287篇 |
口腔科学 | 2225篇 |
临床医学 | 8331篇 |
内科学 | 11960篇 |
皮肤病学 | 619篇 |
神经病学 | 2681篇 |
特种医学 | 3933篇 |
外国民族医学 | 3篇 |
外科学 | 6034篇 |
综合类 | 15592篇 |
一般理论 | 20篇 |
预防医学 | 12007篇 |
眼科学 | 1732篇 |
药学 | 5581篇 |
5篇 | |
中国医学 | 5373篇 |
肿瘤学 | 3419篇 |
出版年
2023年 | 247篇 |
2022年 | 402篇 |
2021年 | 484篇 |
2020年 | 467篇 |
2019年 | 354篇 |
2018年 | 555篇 |
2017年 | 459篇 |
2016年 | 523篇 |
2015年 | 572篇 |
2014年 | 877篇 |
2013年 | 1247篇 |
2012年 | 2255篇 |
2011年 | 5966篇 |
2010年 | 3239篇 |
2009年 | 2196篇 |
2008年 | 3021篇 |
2007年 | 2836篇 |
2006年 | 2888篇 |
2005年 | 3949篇 |
2004年 | 9003篇 |
2003年 | 8357篇 |
2002年 | 6489篇 |
2001年 | 5082篇 |
2000年 | 3259篇 |
1999年 | 3810篇 |
1998年 | 2597篇 |
1997年 | 2305篇 |
1996年 | 1530篇 |
1995年 | 1367篇 |
1994年 | 1437篇 |
1993年 | 2097篇 |
1992年 | 1841篇 |
1991年 | 1547篇 |
1990年 | 1219篇 |
1989年 | 1035篇 |
1988年 | 802篇 |
1987年 | 664篇 |
1986年 | 634篇 |
1985年 | 379篇 |
1984年 | 240篇 |
1983年 | 180篇 |
1982年 | 132篇 |
1981年 | 110篇 |
1980年 | 102篇 |
1979年 | 159篇 |
1978年 | 103篇 |
1977年 | 115篇 |
1975年 | 105篇 |
1974年 | 107篇 |
1973年 | 116篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
Kara S. Tanaka MD Veronica R. Andaya BA Steven W. Thorpe MD Kenneth R. Gundle MD James B. Hayden MD Yee-Cheen Duong MD Raffi S. Avedian MD David G. Mohler MD Lee J. Morse MD Melissa N. Zimel MD Richard J. O'Donnell MD Andrew Fang MD Robert Lor Randall MD Tina H. Tran BS Christin New BA Rosanna L. Wustrack MD other members of Study Group FORCE 《Journal of surgical oncology》2023,127(1):148-158
2.
中国抗癌协会神经内分泌肿瘤专业委员会 《中国癌症杂志》2022,32(6):545-579
神经内分泌肿瘤(neuroendocrine neoplasm,NEN)是一类起源于肽能神经元和神经内分泌细胞,具有神经内分泌分化并表达神经内分泌标志物的少见肿瘤,可发生于全身各处,以肺及胃肠胰NEN(gastroenteropancreatic neuroendocrine neoplasm, GEP-NEN)最常见。国内外研究数据均提示,NEN的发病率在不断上升。美国流行病学调查结果显示,与其他类型肿瘤相比,NEN的发病率上升趋势更为显著。中国抗癌协会神经内分泌肿瘤专委会在现有循证医学证据基础上,结合已有国内外指南和共识,制订了首版中国抗癌协会神经内分泌肿瘤诊治指南,为临床工作者提供参考。 相似文献
3.
4.
中华医学会器官移植学分会 《中华移植杂志(电子版)》2020,14(3):136-142
儿童心脏移植是治疗年龄18岁终末期心力衰竭患者的有效手段。1967年美国Adrian Katrowitz实施第一例儿童心脏移植,近五年全球80家单位每年开展500例左右。中国儿童心脏移植起步晚、发展慢。自1995年开展第一例儿童心脏移植以来,目前国内已登记病例超过130例。中华医学会器官移植学分会组织心脏移植专家,总结国内外相关研究最新进展,结合国际指南和临床实践,针对儿童心脏移植受者选择及常用术式的操作要点、程序和方法,以及各类复杂先天性心脏病心脏移植的特殊操作,制订《中国儿童心脏移植适操作规范(2019版)》。 相似文献
5.
Journal of Chinese Pharmaceutical Sciences 《中国药学》2019,28(12):889-901
6.
K. Bhatia Group of Obstetric Anaesthetists of Lancashire Greater Manchester Mersey Study Collaborators 《Anaesthesia》2022,77(4):389-397
Since the start of the COVID-19 pandemic, few studies have reported anaesthetic outcomes in parturients with SARS-CoV-2 infection. We reviewed the labour analgesic and anaesthetic interventions utilised in symptomatic and asymptomatic parturients who had a confirmed positive test for SARS-CoV-2 across 10 hospitals in the north-west of England between 1 April 2020 and 31 May 2021. Primary outcomes analysed included the analgesic/anaesthetic technique utilised for labour and caesarean birth. Secondary outcomes included a comparison of maternal characteristics, caesarean birth rate, maternal critical care admission rate along with adverse composite neonatal outcomes. A positive SARS-CoV-2 test was recorded in 836 parturients with 263 (31.4%) reported to have symptoms of COVID-19. Neuraxial labour analgesia was utilised in 104 (20.4%) of the 509 parturients who went on to have a vaginal birth. No differences in epidural analgesia rates were observed between symptomatic and asymptomatic parturients (OR 1.03, 95%CI 0.64–1.67; p = 0.90). The neuraxial anaesthesia rate in 310 parturients who underwent caesarean delivery was 94.2% (95%CI 90.6–96.0%). The rates of general anaesthesia were similar in symptomatic and asymptomatic parturients (6% vs. 5.7%; p = 0.52). Symptomatic parturients were more likely to be multiparous (OR 1.64, 95%CI 1.19–2.22; p = 0.002); of Asian ethnicity (OR 1.54, 1.04–2.28; p = 0.03); to deliver prematurely (OR 2.16, 95%CI 1.47–3.19; p = 0.001); have a higher caesarean birth rate (44.5% vs. 33.7%; OR 1.57, 95%CI 1.16–2.12; p = 0.008); and a higher critical care utilisation rate both pre- (8% vs. 0%, p = 0.001) and post-delivery (11% vs. 3.5%; OR 3.43, 95%CI 1.83–6.52; p = 0.001). Eight neonates tested positive for SARS-CoV-2 while no differences in adverse composite neonatal outcomes were observed between those born to symptomatic and asymptomatic mothers (25.8% vs. 23.8%; OR 1.11, 95%CI 0.78–1.57; p = 0.55). In women with COVID-19, non-neuraxial analgesic regimens were commonly utilised for labour while neuraxial anaesthesia was employed for the majority of caesarean births. Symptomatic women with COVID-19 are at increased risk of significant maternal morbidity including preterm birth, caesarean birth and peripartum critical care admission. 相似文献
7.
The group of Professor Ning Jiao and Professor Song Song have made new progress in the field of electrophilic halogenation modification of electron-deficient aromatics 下载免费PDF全文
8.
9.
L. Misery E. Weisshaar E. Brenaut A.W.M. Evers F. Huet S. Ständer A. Reich E. Berardesca E. Serra-Baldrich J. Wallengren D. Linder J.W. Fluhr J.C. Szepietowski H. Maibach for the Special Interest Group on sensitive skin of the International Forum for the Study of Itch 《Journal of the European Academy of Dermatology and Venereology》2020,34(2):222-229
The special interest group on sensitive skin of the International Forum for the Study of Itch previously defined sensitive skin as a syndrome defined by the occurrence of unpleasant sensations (stinging, burning, pain, pruritus and tingling sensations) in response to stimuli that normally should not provoke such sensations. This additional paper focuses on the pathophysiology and the management of sensitive skin. Sensitive skin is not an immunological disorder but is related to alterations of the skin nervous system. Skin barrier abnormalities are frequently associated, but there is no cause and direct relationship. Further studies are needed to better understand the pathophysiology of sensitive skin – as well as the inducing factors. Avoidance of possible triggering factors and the use of well-tolerated cosmetics, especially those containing inhibitors of unpleasant sensations, might be suggested for patients with sensitive skin. The role of psychosocial factors, such as stress or negative expectations, might be relevant for subgroups of patients. To date, there is no clinical trial supporting the use of topical or systemic drugs in sensitive skin. The published data are not sufficient to reach a consensus on sensitive skin management. In general, patients with sensitive skin require a personalized approach, taking into account various biomedical, neural and psychosocial factors affecting sensitive skin. 相似文献
10.
Parallel enzyme‐linked immunosorbent assay screening for human immunodeficiency virus among blood donors in five Chinese blood centres: a retrospective analysis 下载免费PDF全文