全文获取类型
收费全文 | 26586篇 |
免费 | 2194篇 |
国内免费 | 53篇 |
专业分类
耳鼻咽喉 | 218篇 |
儿科学 | 867篇 |
妇产科学 | 679篇 |
基础医学 | 3577篇 |
口腔科学 | 445篇 |
临床医学 | 3631篇 |
内科学 | 4556篇 |
皮肤病学 | 371篇 |
神经病学 | 2986篇 |
特种医学 | 747篇 |
外科学 | 2708篇 |
综合类 | 480篇 |
一般理论 | 43篇 |
预防医学 | 3560篇 |
眼科学 | 581篇 |
药学 | 1694篇 |
中国医学 | 20篇 |
肿瘤学 | 1670篇 |
出版年
2023年 | 179篇 |
2022年 | 260篇 |
2021年 | 524篇 |
2020年 | 324篇 |
2019年 | 522篇 |
2018年 | 604篇 |
2017年 | 464篇 |
2016年 | 462篇 |
2015年 | 578篇 |
2014年 | 765篇 |
2013年 | 1187篇 |
2012年 | 1720篇 |
2011年 | 1794篇 |
2010年 | 935篇 |
2009年 | 831篇 |
2008年 | 1585篇 |
2007年 | 1661篇 |
2006年 | 1756篇 |
2005年 | 1630篇 |
2004年 | 1477篇 |
2003年 | 1377篇 |
2002年 | 1375篇 |
2001年 | 389篇 |
2000年 | 333篇 |
1999年 | 365篇 |
1998年 | 324篇 |
1997年 | 261篇 |
1996年 | 222篇 |
1995年 | 185篇 |
1994年 | 204篇 |
1993年 | 204篇 |
1992年 | 255篇 |
1991年 | 232篇 |
1990年 | 205篇 |
1989年 | 216篇 |
1988年 | 195篇 |
1987年 | 202篇 |
1986年 | 203篇 |
1985年 | 211篇 |
1984年 | 181篇 |
1983年 | 171篇 |
1982年 | 156篇 |
1981年 | 122篇 |
1980年 | 151篇 |
1979年 | 133篇 |
1978年 | 130篇 |
1977年 | 123篇 |
1975年 | 108篇 |
1974年 | 116篇 |
1973年 | 103篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
VorsRiLSG Ruth Schimmelpfeng-Schütte 《MedR Medizinrecht》2006,24(1):21-25
Ohne Zusammenfassung 相似文献
3.
4.
Timothy C. Evans MD PhD ; Keren H. Wick PhD ; Douglas M. Brock PhD ; Douglas C. Schaad PhD ; Ruth Ballweg MPA PA-C 《The Journal of rural health》2006,22(3):212-219
CONTEXT: The physician assistant profession has been moving toward requiring master's degrees for new practitioners, but some argue this could change the face of the discipline. PURPOSE: To see if there is an association between physician assistants' academic degrees and practice in primary care, in rural areas, and with the medically underserved. METHODS: Surveys were sent to 880 graduates of the first 32 University of Washington physician assistant classes through 2000. Respondents noted their academic degree at program entry and the highest degree attained at any time up to the time of survey. Relationships between practice characteristics and academic degree levels were tested by unadjusted odds ratios and logistic regression after controlling for year of graduation and sex. RESULTS: Of the 478 respondents, 54% worked in primary care, about 30% practiced in nonmetropolitan communities, and 42% reported providing care for the medically underserved. Respondents with no degree (33% of total at entry, 24% at survey) were significantly more likely than degree holders to work in primary care and nonmetropolitan areas. Respondents with no degree at program entry were significantly more likely, and those with no degree at the time of the survey were marginally more likely, to self-report work with the medically underserved. CONCLUSION: Respondents with no academic degree are significantly more likely to demonstrate a commitment to primary, rural, and underserved health care. These findings may inform the national debate about the impact of required advanced degrees on the practice patterns of nonphysician providers. 相似文献
5.
6.
Summary The left recurrent laryngeal nerves from five horses with sub-clinical neuropathy were examined by light and electron microscopy in a study designed to examine accumulation of axonal organelles at paranodal and internodal locations. Transverse sections of the nerve showed scattered fibres with split myelin sheaths and axonal accumulation of organelles. On longitudinal sections these collections were seen to result from an axonal outpouching in which dense lamellar bodies and mitochondria had accumulated. These paranodal collections, which could be found on both sides of the node, were often associated with infoldings of the terminal loops of myelin and with occasional paranodal demyelination. The fact that many of the organelles in the outpouches were lysosomal in nature was confirmed by their positive staining for cathepsin D activity. Longitudinal sections demonstrated a number of axons which were swollen over a long distance and which contained focal accumulations of similar organelles. In places, however, there was a clear separation between these organelles and the cytoskeletal proteins. In each case these swollen axons were surrounded by Schwann cell nuclei and their processes, forming well-ordered onion bulbs. The possibility that these two types of changes, i.e. the paranodal accumulations and the axonal swellings could result from a disturbance in axonal transport in this distal axonopathy is discussed. 相似文献
7.
Prognosis of epilepsy 总被引:1,自引:0,他引:1
It has been a widely accepted view that epilepsy is usually a chronic condition in which the prognosis is generally poor and any remissions that do occur are usually temporary. In this article recent studies challenging this view will be considered, other aspects of the long-term prognosis for seizure control in epilepsy reviewed, and the mortality rates and causes of premature death in epilepsy outlined. 相似文献
8.
9.
Mihaly Arato Ed Frecska Duncan J. MacCrimmon Rick Guscott Bishan Saxena Kornelia Tekes Laszlo Tothfalusi 《Progress in neuro-psychopharmacology & biological psychiatry》1991,15(6):759-764
1. Postmortem neurochemical investigations revealed interhemispheric asymmetry in the mediofrontal region of human brain. Significantly higher right hemisphere serotonin metabolite (5HIAA) content as well as increased maximal imipramine binding (IB) were found in the right hemisphere than in the left side.
2. IB did not show a gender difference in the mediofrontal area. However, women had higher IB in the right orbital frontal cortex than did men.
3. In vivo pharmaco-EEG results tend to support the postmortem neurochemical data. Intravenous chlorimipramine resulted in an asymmetric topographic distribution of the P300 auditory evoked potential, peak amplitudes were shifted to the right hemisphere. 相似文献
10.