全文获取类型
收费全文 | 2046977篇 |
免费 | 148014篇 |
国内免费 | 3121篇 |
专业分类
耳鼻咽喉 | 29339篇 |
儿科学 | 62204篇 |
妇产科学 | 57271篇 |
基础医学 | 295006篇 |
口腔科学 | 59640篇 |
临床医学 | 175620篇 |
内科学 | 400428篇 |
皮肤病学 | 42732篇 |
神经病学 | 159325篇 |
特种医学 | 80387篇 |
外国民族医学 | 438篇 |
外科学 | 324233篇 |
综合类 | 41578篇 |
现状与发展 | 2篇 |
一般理论 | 510篇 |
预防医学 | 144375篇 |
眼科学 | 47284篇 |
药学 | 158189篇 |
3篇 | |
中国医学 | 4301篇 |
肿瘤学 | 115247篇 |
出版年
2018年 | 19089篇 |
2016年 | 16328篇 |
2015年 | 18836篇 |
2014年 | 25809篇 |
2013年 | 38809篇 |
2012年 | 53213篇 |
2011年 | 56532篇 |
2010年 | 33522篇 |
2009年 | 31768篇 |
2008年 | 55078篇 |
2007年 | 59041篇 |
2006年 | 60107篇 |
2005年 | 58570篇 |
2004年 | 56567篇 |
2003年 | 54678篇 |
2002年 | 53835篇 |
2001年 | 102490篇 |
2000年 | 105728篇 |
1999年 | 89199篇 |
1998年 | 23159篇 |
1997年 | 20590篇 |
1996年 | 20809篇 |
1995年 | 19524篇 |
1994年 | 18396篇 |
1993年 | 17008篇 |
1992年 | 70291篇 |
1991年 | 68321篇 |
1990年 | 66883篇 |
1989年 | 65124篇 |
1988年 | 60292篇 |
1987年 | 58821篇 |
1986年 | 55683篇 |
1985年 | 53195篇 |
1984年 | 38893篇 |
1983年 | 33471篇 |
1982年 | 18835篇 |
1981年 | 16565篇 |
1979年 | 35894篇 |
1978年 | 24808篇 |
1977年 | 21421篇 |
1976年 | 19565篇 |
1975年 | 21507篇 |
1974年 | 25663篇 |
1973年 | 24444篇 |
1972年 | 23344篇 |
1971年 | 21857篇 |
1970年 | 20527篇 |
1969年 | 19665篇 |
1968年 | 18242篇 |
1967年 | 16129篇 |
排序方式: 共有10000条查询结果,搜索用时 600 毫秒
121.
J. Savige L. Amos Frank Ierino H. G. Mack R. C. Andrew Symons P. Hughes 《Ophthalmic genetics》2016,37(4):369-376
Background: Dense deposit disease and atypical hemolytic uremic syndrome are often caused by Complement Factor H (CFH) mutations. This study describes the retinal abnormalities in dense deposit disease and, for the first time, atypical haemolytic uremic syndrome. It also reviews our understanding of drusen pathogenesis and their relevance for glomerular disease. Methods: Six individuals with dense deposit disease and one with atypical haemolytic uremic syndrome were studied from 2 to 40 years after presentation. Five had renal transplants. All four who had genetic testing had CFH mutations. Individuals underwent ophthalmological review and retinal photography, and in some cases, optical coherence tomography, and further tests of retinal function. Results: All subjects with dense deposit disease had impaired night vision and retinal drusen or whitish-yellow deposits. Retinal atrophy, pigmentation, and hemorrhage were common. In late disease, peripheral vision was restricted, central vision was distorted, and there were scotoma from sub-retinal choroidal neovascular membranes and atypical serous retinopathy. Drusen were present but less prominent in the young person with atypical uremic syndrome due to a heterozygous CFH mutation. Conclusions: Drusen are common in forms of C3 glomerulopathy caused by compound heterozygous or heterozygous CFH mutations. They are useful diagnostically but also impair vision. Drusen have an identical composition to glomerular deposits. They are also identical to the drusen of age-related macular degeneration, and may respond to the same treatments. Individuals with a C3 glomerulopathy should be assessed ophthalmologically at diagnosis, and monitored regularly for vision-threatening complications. 相似文献
122.
A novel BRAF mutation in association with primary amelanotic melanoma with oral metastases
下载免费PDF全文
![点击此处可从《Journal of the European Academy of Dermatology and Venereology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
123.
124.
125.
126.
Christopher Yeh Cem Atillasoy John T. Seykora Vivian Lee 《Journal of cutaneous pathology》2021,48(1):171-173
Respiratory cysts are benign lesions lined by normal respiratory epithelium. There are few reported cases localized to the orbit, while those of the eyelid are exceedingly rare. Respiratory cysts usually arise either from a non‐hereditary congenital malformation, where they are distinguished as choristomatous, or from trauma. Here, we report a case of a 53‐year‐old man who presented with a large right lower eyelid cyst that was histopathologically diagnosed as a respiratory cyst. 相似文献
127.
Naveen B.S. M.T. Mohan J. Tharayil S.T. Joseph 《International journal of oral and maxillofacial surgery》2021,50(8):1003-1008
A local pedicled vascularized bone flap can prevent the morbidity and cost of free bone flap surgery in small segmental bone defects or long cartilaginous defects of the head and neck. Such flaps can also be useful in patients who are high risk for surgery. The periosteal vascularity of the mandible can be used to design islanded facial artery-based bone flaps, which can be utilized to that extent. Two patients with a small segmental mandibulectomy defect and one patient with a long cricotracheal resection defect underwent reconstruction using three different designs of islanded facial artery osteomyomucosal/osseous flap (iFOMM). The patients had a minimum follow-up period of 18 months. All flaps were successful, with satisfactory healing and without any functional deficit or disease at last follow-up. 相似文献
128.
129.
Turnbull Chris D. Stockley James A. Madathil Shyam Huq Syed S. A. Cooper Brendan G. Ali Asad Wharton Simon Stradling John R. Heitmar Rebekka 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2022,260(7):2129-2139
Graefe's Archive for Clinical and Experimental Ophthalmology - Retinal microvascular endothelial dysfunction is thought to be of importance in the development of ocular vascular diseases.... 相似文献
130.
Die Anaesthesiologie - Die Versorgungsforschung (VF) ist ein fachübergreifendes multidisziplinäres Forschungsgebiet, das die Kranken- und Gesundheitsversorgung sowie ihre... 相似文献