全文获取类型
收费全文 | 2061137篇 |
免费 | 146506篇 |
国内免费 | 6127篇 |
专业分类
耳鼻咽喉 | 30394篇 |
儿科学 | 59832篇 |
妇产科学 | 56647篇 |
基础医学 | 291235篇 |
口腔科学 | 62498篇 |
临床医学 | 179942篇 |
内科学 | 397595篇 |
皮肤病学 | 45215篇 |
神经病学 | 162124篇 |
特种医学 | 81415篇 |
外国民族医学 | 517篇 |
外科学 | 321078篇 |
综合类 | 50087篇 |
现状与发展 | 14篇 |
一般理论 | 647篇 |
预防医学 | 144182篇 |
眼科学 | 49432篇 |
药学 | 158008篇 |
26篇 | |
中国医学 | 6271篇 |
肿瘤学 | 116611篇 |
出版年
2018年 | 19760篇 |
2016年 | 17578篇 |
2015年 | 20040篇 |
2014年 | 27618篇 |
2013年 | 40592篇 |
2012年 | 54217篇 |
2011年 | 57212篇 |
2010年 | 34013篇 |
2009年 | 32597篇 |
2008年 | 54442篇 |
2007年 | 58170篇 |
2006年 | 59049篇 |
2005年 | 57141篇 |
2004年 | 55149篇 |
2003年 | 53159篇 |
2002年 | 52205篇 |
2001年 | 101229篇 |
2000年 | 104144篇 |
1999年 | 87952篇 |
1998年 | 23020篇 |
1997年 | 20793篇 |
1996年 | 20244篇 |
1995年 | 19142篇 |
1994年 | 17790篇 |
1993年 | 16465篇 |
1992年 | 67796篇 |
1991年 | 65562篇 |
1990年 | 64161篇 |
1989年 | 62427篇 |
1988年 | 57856篇 |
1987年 | 56719篇 |
1986年 | 53773篇 |
1985年 | 51445篇 |
1984年 | 37924篇 |
1983年 | 32409篇 |
1982年 | 18581篇 |
1981年 | 16820篇 |
1979年 | 35949篇 |
1978年 | 25296篇 |
1977年 | 21997篇 |
1976年 | 19673篇 |
1975年 | 22161篇 |
1974年 | 26438篇 |
1973年 | 25547篇 |
1972年 | 24291篇 |
1971年 | 22774篇 |
1970年 | 21681篇 |
1969年 | 20631篇 |
1968年 | 19227篇 |
1967年 | 17279篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
992.
H. Fjeldsøe-Nielsen M. Unemo H. Fredlund S. V. Hjorth L. M. Berthelsen H. M. Palmer A. Friis-Møller 《European journal of clinical microbiology & infectious diseases》2005,24(4):280-283
In the study presented here 26 recent Danish clinical isolates of prolyliminopeptidase (PIP)-negative Neisseria gonorrhoeae were phenotypically and genotypically characterized to investigate whether one or more PIP-negative strains are circulating in the Danish community. The profiles of these isolates were compared with those of three isolates from a recent outbreak of PIP-negative N. gonorrhoeae infection in the UK. Twenty-five of the Danish isolates and all three UK isolates had similar antibiograms and were designated serovar IB-4. Genotypic characterization by pulsed-field gel electrophoresis, porB1b gene sequencing, and opa-typing revealed that these isolates were indistinguishable or closely related. The results indicate that at least one PIP-negative N. gonorrhoeae strain is currently circulating in the Danish community, and this strain is indistinguishable from the one that caused an outbreak in the UK.An erratum to this article can be found at 相似文献
993.
T. Pinzer M. Reiß H. Bourquain K. G. Krishnan G. Schackert 《Acta neurochirurgica》2006,148(10):1085-1090
Summary Aspergillosis belongs to the group of mycotic diseases of paranasal sinuses. The invasive forms, and particularly the fulminant
forms, are potentially fatal. Isolated aspergillosis of the sphenoid sinus or the clivus is a difficult diagnosis, since the
often misleading clinical manifestations of this rare disease develop late. These patients become apparent by neurological
signs such as cavernous sinus syndrome, pseudotumor of the pituitary or the orbit. Diagnosis is often made intra-operatively
or on histological examination.
We report a case of invasive aspergillosis uniquely involving the sellar area revealed by clinical features suggesting a pseudotumor
of the pituitary. Although such lesions are almost always seen in immune suppressed subjects, in our case, the patient was
immune competent and had no past history of sinusitis.
The question of whether, and when to perform limited or extensive surgery remains an issue for discussion, owing to the rarity
of this disease honed by lack of experience. It depends on several factors: the kind of disease, the immunity, the subtype
of invasive fungal sinusitis and the degree of tissue invasion. 相似文献
994.
995.
996.
997.
998.
999.
1000.