全文获取类型
收费全文 | 15763篇 |
免费 | 1116篇 |
国内免费 | 42篇 |
专业分类
耳鼻咽喉 | 208篇 |
儿科学 | 470篇 |
妇产科学 | 483篇 |
基础医学 | 2221篇 |
口腔科学 | 555篇 |
临床医学 | 1534篇 |
内科学 | 2590篇 |
皮肤病学 | 623篇 |
神经病学 | 1596篇 |
特种医学 | 655篇 |
外科学 | 2319篇 |
综合类 | 193篇 |
一般理论 | 3篇 |
预防医学 | 1054篇 |
眼科学 | 332篇 |
药学 | 1025篇 |
中国医学 | 42篇 |
肿瘤学 | 1018篇 |
出版年
2021年 | 225篇 |
2020年 | 159篇 |
2019年 | 233篇 |
2018年 | 284篇 |
2017年 | 236篇 |
2016年 | 297篇 |
2015年 | 346篇 |
2014年 | 441篇 |
2013年 | 545篇 |
2012年 | 803篇 |
2011年 | 865篇 |
2010年 | 532篇 |
2009年 | 516篇 |
2008年 | 817篇 |
2007年 | 896篇 |
2006年 | 920篇 |
2005年 | 844篇 |
2004年 | 774篇 |
2003年 | 704篇 |
2002年 | 720篇 |
2001年 | 391篇 |
2000年 | 331篇 |
1999年 | 326篇 |
1998年 | 179篇 |
1997年 | 153篇 |
1996年 | 123篇 |
1995年 | 129篇 |
1994年 | 121篇 |
1993年 | 121篇 |
1992年 | 235篇 |
1991年 | 183篇 |
1990年 | 233篇 |
1989年 | 219篇 |
1988年 | 218篇 |
1987年 | 203篇 |
1986年 | 190篇 |
1985年 | 176篇 |
1984年 | 144篇 |
1983年 | 126篇 |
1982年 | 81篇 |
1981年 | 83篇 |
1979年 | 124篇 |
1978年 | 102篇 |
1977年 | 87篇 |
1975年 | 94篇 |
1974年 | 94篇 |
1973年 | 96篇 |
1971年 | 86篇 |
1970年 | 86篇 |
1969年 | 80篇 |
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
1.
Härter Martin Koch-Gromus Uwe 《Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz》2022,65(3):267-269
Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz - 相似文献
2.
Koch-Gromus Uwe Bergelt Corinna 《Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz》2022,65(4):403-405
Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz - 相似文献
3.
Wiemann Greta Pertz Milena Kowalski Thomas Seidel Sabine Schlegel Uwe Thoma Patrizia 《Journal of neuro-oncology》2020,146(1):171-180
Journal of Neuro-Oncology - Evidence supporting routine postoperative antiepileptic drug (AED) prophylaxis following oncologic neurosurgery is limited, and actual practice patterns are largely... 相似文献
4.
ABSTRACTObjectives: The consequences of polypharmacy (intake of ≥ 5 drugs) are diverse, including drug interactions, rising costs and side effects. Risk groups for polypharmacy are multimorbid and chronically ill people, such as patients with multiple sclerosis (MS). MS is the most common neuroimmunological disease in young adults worldwide. We aimed to provide a systematic overview of the current research status regarding frequency and predictors of polypharmacy in MS patients.Methods: A systematic literature search in the databases PubMed, Cochrane Library and Scopus was carried out according to the PRISMA guidelines. English and German original research articles were included.Results: Seven studies fulfilled the inclusion criteria of this review, while the research objectives and methods were very heterogenous. The polypharmacy rates in these studies ranged from 15% to 59%. Polypharmacy correlated with comorbidities, increased disability, cognitive deficits, increased hospitalization, higher relapse rate and lower quality of life.Conclusions: In MS patients, polypharmacy is common and closely associated with health issues. There is a great need for research in this area, especially regarding longitudinal changes in drug utilization. Effective networks between physicians and pharmacists are needed to optimize medication management for patients and to achieve the best possible therapy results. 相似文献
5.
6.
Die Anaesthesiologie - Die Intensive Care Unit-Acquired Weakness (ICUAW) stellt eine der häufigsten neuromuskulären Komplikationen in der Intensivmedizin dar. Besonders bei... 相似文献
7.
Jamie V. de Seymour Kathryn L. Beck Cathryn A. Conlon 《Obstetrics, Gynaecology and Reproductive Medicine》2019,29(8):219-224
Many pregnant women rely on their health professional for nutrition information during routine antenatal visits. This review offers information to assist health professionals with advising pregnant women of the important nutrition considerations during pregnancy. The roles of some of the key nutrients are discussed, including folic acid, iodine, iron, calcium, and vitamin D. Recommendations for each of the key nutrients are covered and examples of how these can be achieved are presented. The review also details additional nutritional considerations that should be discussed during antenatal consults, including energy balance and weight gain recommendations, the importance of food safety during pregnancy, the recommended safe levels of consumption of vitamin A, caffeine, and fish, and the importance of abstaining from alcohol. Educating and supporting women during pregnancy to make healthy food choices to fulfil their needs and the needs of their growing fetus, will help to promote a healthy start to life. 相似文献
8.
Evangelia Liouta Vasileios K Katsaros George Stranjalis Edyta Leks Uwe Klose Sotirios Bisdas 《Journal of neuroradiology. Journal de neuroradiologie》2019,46(3):199-206
Background and purpose
Evidence of pre-operative resting state functional magnetic resonance (RS-fMRI) validation by correlating it with clinical pre-operative status in brain tumor patients is scarce. Our aim was to validate the functional relevance of RS-fMRI by investigating the association between RS-fMRI and pre-operative motor and language function performance in patients with brain tumor.Materials and methods
Sixty-nine patients with brain tumors were prospectively recruited. Patients with tumors near precentral gyrus (n?=?49) underwent assessment for apparent (paresis) and subtle (finger tapping) deficits. Patients with left frontal tumors in the vicinity of the inferior frontal gyrus (n?=?29) underwent assessment for gross (aphasia) and mild language (phonological verbal fluency) deficits. RS-fMRI results were extracted by spatial independent component analysis (ICA).Results
Motor group: paretic patients showed significantly (P?=?0.01) decreased BOLD signal in ipsilesional precentral gyrus when compared to contralesional one. Significantly (P?<?0.01) lower BOLD signal was also observed in ipsilesional precentral gyrus of paretics when compared with the non-paretics. In asymptomatic patients, a strong positive correlation (r?=?0.68, P?<?0.01) between ipsilesional motor cortex BOLD signal and contralesional finger tapping performance was observed. Language group: patients with aphasia showed significantly (P?=?0.01) decreased RS-fMRI BOLD signal in left BA 44 when compared with non- aphasics. In asymptomatic patients, a strong positive correlation (r?=?0.72, P?<?0.01) between BA 44 BOLD signal and phonological fluency performance was observed.Conclusions
Our results showed that RS-fMRI BOLD signal of motor and language networks were significantly affected by the tumors implying the usefulness of the method for assessment of the underlying functions in brain tumors patients. 相似文献9.
Joss von Hadeln Ronja Hensgen Tobias Bockhorst Ronny Rosner Ronny Heidasch Uta Pegel Manuel Quintero Pérez Uwe Homberg 《The Journal of comparative neurology》2020,528(6):906-934
The central complex (CX) comprises a group of midline neuropils in the insect brain, consisting of the protocerebral bridge (PB), the upper (CBU) and lower division (CBL) of the central body and a pair of globular noduli. It receives prominent input from the visual system and plays a major role in spatial orientation of the animals. Vertical slices and horizontal layers of the CX are formed by columnar, tangential, and pontine neurons. While pontine and columnar neurons have been analyzed in detail, especially in the fruit fly and desert locust, understanding of the organization of tangential cells is still rudimentary. As a basis for future functional studies, we have studied the morphologies of tangential neurons of the CX of the desert locust Schistocerca gregaria. Intracellular dye injections revealed 43 different types of tangential neuron, 8 of the PB, 5 of the CBL, 24 of the CBU, 2 of the noduli, and 4 innervating multiple substructures. Cell bodies of these neurons were located in 11 different clusters in the cell body rind. Judging from the presence of fine versus beaded terminals, the vast majority of these neurons provide input into the CX, especially from the lateral complex (LX), the superior protocerebrum, the posterior slope, and other surrounding brain areas, but not directly from the mushroom bodies. Connections are largely subunit- and partly layer-specific. No direct connections were found between the CBU and the CBL. Instead, both subdivisions are connected in parallel with the PB and distinct layers of the noduli. 相似文献
10.
E.L. Simpson J.-P. Lacour L. Spelman R. Galimberti L.F. Eichenfield R. Bissonnette B.A. King J.P. Thyssen J.I. Silverberg T. Bieber K. Kabashima Y. Tsunemi A. Costanzo E. Guttman-Yassky L.A. Beck J.M. Janes A.M. DeLozier M. Gamalo D.R. Brinker T. Cardillo F.P. Nunes A.S. Paller A. Wollenberg K. Reich 《The British journal of dermatology》2020,183(2):242-255