全文获取类型
收费全文 | 18644篇 |
免费 | 1081篇 |
国内免费 | 67篇 |
专业分类
耳鼻咽喉 | 485篇 |
儿科学 | 1339篇 |
妇产科学 | 589篇 |
基础医学 | 1376篇 |
口腔科学 | 1107篇 |
临床医学 | 1560篇 |
内科学 | 3024篇 |
皮肤病学 | 516篇 |
神经病学 | 1317篇 |
特种医学 | 728篇 |
外科学 | 4173篇 |
综合类 | 338篇 |
一般理论 | 8篇 |
预防医学 | 733篇 |
眼科学 | 528篇 |
药学 | 1286篇 |
中国医学 | 149篇 |
肿瘤学 | 536篇 |
出版年
2024年 | 25篇 |
2023年 | 253篇 |
2022年 | 124篇 |
2021年 | 325篇 |
2020年 | 294篇 |
2019年 | 336篇 |
2018年 | 686篇 |
2017年 | 546篇 |
2016年 | 668篇 |
2015年 | 595篇 |
2014年 | 727篇 |
2013年 | 1264篇 |
2012年 | 1040篇 |
2011年 | 1281篇 |
2010年 | 844篇 |
2009年 | 470篇 |
2008年 | 873篇 |
2007年 | 958篇 |
2006年 | 1046篇 |
2005年 | 1125篇 |
2004年 | 1051篇 |
2003年 | 1029篇 |
2002年 | 957篇 |
2001年 | 583篇 |
2000年 | 603篇 |
1999年 | 385篇 |
1998年 | 230篇 |
1997年 | 171篇 |
1996年 | 183篇 |
1995年 | 117篇 |
1994年 | 118篇 |
1993年 | 97篇 |
1992年 | 84篇 |
1991年 | 70篇 |
1990年 | 53篇 |
1989年 | 36篇 |
1988年 | 45篇 |
1987年 | 28篇 |
1986年 | 32篇 |
1985年 | 31篇 |
1984年 | 31篇 |
1983年 | 27篇 |
1982年 | 34篇 |
1981年 | 29篇 |
1980年 | 27篇 |
1979年 | 29篇 |
1978年 | 18篇 |
1977年 | 18篇 |
1976年 | 17篇 |
1974年 | 17篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Increased arterial stiffness in young normotensive patients with Turner syndrome: associations with vascular biomarkers 下载免费PDF全文
2.
3.
Irmak Karaca Suzan Güven Yılmaz Melis Palamar Halil Ateş 《Ocular immunology and inflammation》2020,28(6):947-951
ABSTRACT
Purpose
To investigate the effect of 1% tropicamide on anterior chamber aqueous flare (ACAF) measurements acquired with laser flare meter in patients with pseudoexfoliation. 相似文献4.
Meral T. Ercan Nedim C. M. Gülaldi Işil S. Ünsal Mehmet Aydin İrfan Peksoy Zafer Hasçelik 《Annals of nuclear medicine》1996,10(4):419-423
The present study evaluated99mTc(V) DMSA as an agent for the visualization of inflammatory lesions in comparison to99mTc(HI) DMSA and99mTc-HIG. All three radiopharmaceuticals were prepared with commercial kits.99mTc(V) DMSA was prepared at neutral pH by the addition of first bicarbonate and then pertechnetate to the kit contents. The labeling efficiency was 99% as determined by ITLC. Abscesses were induced by i.m. injection of 50 μl turpentine into the right thighs of 36 Swiss albino mice. Six days later 3.7 MBq of each radiopharmaceutical was i.v. administered to 12 mice. The mice were sacrificed at 1,3,6 and 24 h later. Scintigrams were obtained with a gamma camera. The abscesses were better visualized on scintigrams with99mTc(V) DMSA compared to99mTc(III) DMSA, starting at 1 h. The animals were dissected and the organs were removed, weighed and the radioactivity determined with a gamma counter. The abscess to other tissue ratios were higher with99mTc(V) DMSA than the other radiopharmaceuticals. The max. abscess/muscle ratios were 9.46 ± 3.20 (24 h), 4.19 ± 1.39 (6 h) and 5.98 ± 1.17 (24 h) and max. abscess/blood ratios were 6.22 ± 1.41, 4.09 ± 0.84 and 0.914 ± 0.351 all at 24 h for99mTc(V) DMSA,99mTc(III) DMSA and99mTc-HIG, respectively. Experimental arthritis was produced in 6 New Zealand white rabbits by intra-articular injection of ovalbumin. Four days later 37 MBq of99mTc(V) DMSA and99mTc-HIG were each i.v. administered to 3 rabbits. Scintigrams obtained at 1, 3, 6, and 24 h clearly demonstrated arthritic joints. ROFs over arthritic joints were compared to contralateral normal joints (A/C). The max. A/C ratios were 2.10 ± 0.31 (3 h) and 2.92 ± 0.99 (24 h) for99mTc(V) DMSA and99mTc-HIG, respectively. Our results indicated the feasibility of imaging inflammatory lesions with99mTc(V) DMSA. 相似文献
5.
Summary Split or full thickness eyelid defects resulting from tumor destruction or surgical excision present a dilemma for plastic and reconstructive surgeons. Full thickness eyelid replacement requires composite grafting of the skin, together with tarsal support of its substitute and mucosa. The flap described by Fricke in 1829 was used for reconstruction of anterior lamella in six lower eyelid defects. In three of our cases chondromucosal grafts taken from nasal septum were utilized for posterior lamella repair. The results have been satisfactory from a functional and cosmetic standpoint. 相似文献
6.
Å. Öst P. Lindström B. Christensson H. Gyllenhammar L. Engstedt 《European journal of haematology》1984,33(2):160-170
A consecutive series of patients (1978–1981) comprising all patients with acute leukaemia from a population of 475000 inhabitants was reviewed. Thus, 94 patients were diagnosed as having acute leukaemia. No patients were lost from follow-up. The incidence figures of ALL and AML differed significantly from those of Sweden as a whole. 9 patients were < 15 years old. The median age of adult patients was 64 years, 60.8% being ≥ 60 years old. Of adult patients with AML, 20% had a preleukaemic history (chronic myeloproliferative disorders, myelodysplastic syndromes and others). None of 6 patients with leukaemia as a metamorphosis of a chronic myeloproliferative disorder achieved a complete remission. The overall remission rate of the remaining adult patients was 25%. Treated patients, 15–39 years old, with AML without any preleukaemic history, had a complete remission rate of 80% compared to 12% for patients ≥ 60 years old with the same diagnosis. Of 60 patients with ‘primary’ AML, 14 were not treated, mainly because of advanced age and complicating diseases. Most of these patients died within a week of admission. 相似文献
7.
Abstract – Traumatic dental injuries often occur to the teeth and their supporting tissues and they are the main reasons for emergency visit to a dental clinic. Management of a fracture depends on its position and the extent of root involvement. Horizontal root fractures are not seen frequently and the treatment consists of reduction and long‐term rigid fixation of the coronal segment. The present case demonstrates the successful management of two horizontally fractured maxillary central incisors with a follow‐up period of 9 months. 相似文献
8.
I. Celebi S. Tekgül H. A. Özen I. Özgü D. Remzi 《International urology and nephrology》1995,27(2):183-187
Bilateral germ cell tumours of the testis are rare but a rise in their incidence is expected since with the new therapeutic
possibilities a significant improvement in prognosis has been achieved even in patients with advanced metastatic spread. Of
the 210 patients treated for malignent germ cell tumours at our Department, six (2.9%) developed a contralateral testicular
tumour. All patients had metachronous tumours and the second tumours occurred after an interval ranging between 1 and 22 years.
The epidemiology, histology, diagnosis, therapy and prognosis are discussed, and the significance of regular self-examination
of the remaining testis in patients with testicular tumour is emphasized. 相似文献
9.
Olof Lundquist Sven Österlin 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》1994,232(2):71-74
Glycation (nonenzymatic glucosylation) of collagen may play a role in the primary pathology of the vitreous in diabetes. The extent of glycation is determined by the glucose concentration in the tissue. In this study glucose concentration was assayed in blood and vitreous samples obtained from three patient groups undergoing vitrectomy: nondiabetic patients (ND), diabetic patients with insulin-dependent diabetes mellitus (IDDM) and diabetic patients with non-insulin-dependent diabetes mellitus (NIDDM). In the ND group the glucose concentration in the vitreous (3.5 +- 1.8 mM/1) was always lower than in the blood (9.1 +- 3.5 mM/1). In the diabetic groups the vitreous glucose concentration was, with a few exceptions, generally lower than the blood glucose concentration. The vitreous glucose concentration in these groups was generally higher (IDDM 9.4+-3.3 mM/1, NIDDM 7.2+-3.9 mM/1) than in the ND group, and in 15 specimens exceeded 11 mM/1, a level increasing the probability of collagen glycation in the vitreous of diabetic patients.This study was given financial support by the Herman Järnhardt Foundation, the Inez and Joel Carlsson Foundation and by Diabetesföreningen in Malmö 相似文献
10.