全文获取类型
收费全文 | 8854篇 |
免费 | 497篇 |
国内免费 | 30篇 |
专业分类
耳鼻咽喉 | 78篇 |
儿科学 | 228篇 |
妇产科学 | 142篇 |
基础医学 | 1029篇 |
口腔科学 | 104篇 |
临床医学 | 935篇 |
内科学 | 2367篇 |
皮肤病学 | 200篇 |
神经病学 | 820篇 |
特种医学 | 151篇 |
外科学 | 1331篇 |
综合类 | 55篇 |
一般理论 | 2篇 |
预防医学 | 724篇 |
眼科学 | 122篇 |
药学 | 596篇 |
中国医学 | 22篇 |
肿瘤学 | 475篇 |
出版年
2023年 | 52篇 |
2022年 | 43篇 |
2021年 | 195篇 |
2020年 | 117篇 |
2019年 | 235篇 |
2018年 | 344篇 |
2017年 | 211篇 |
2016年 | 211篇 |
2015年 | 281篇 |
2014年 | 257篇 |
2013年 | 394篇 |
2012年 | 731篇 |
2011年 | 759篇 |
2010年 | 392篇 |
2009年 | 282篇 |
2008年 | 625篇 |
2007年 | 633篇 |
2006年 | 603篇 |
2005年 | 538篇 |
2004年 | 481篇 |
2003年 | 475篇 |
2002年 | 446篇 |
2001年 | 92篇 |
2000年 | 85篇 |
1999年 | 86篇 |
1998年 | 68篇 |
1997年 | 33篇 |
1996年 | 36篇 |
1995年 | 32篇 |
1994年 | 18篇 |
1993年 | 36篇 |
1992年 | 69篇 |
1991年 | 55篇 |
1990年 | 54篇 |
1989年 | 52篇 |
1988年 | 52篇 |
1987年 | 38篇 |
1986年 | 40篇 |
1985年 | 37篇 |
1984年 | 25篇 |
1983年 | 34篇 |
1982年 | 15篇 |
1981年 | 13篇 |
1980年 | 12篇 |
1979年 | 19篇 |
1977年 | 8篇 |
1974年 | 7篇 |
1973年 | 6篇 |
1968年 | 7篇 |
1967年 | 5篇 |
排序方式: 共有9381条查询结果,搜索用时 8 毫秒
1.
2.
3.
Low myocardial glucose uptake in Turner syndrome is unaffected by growth hormone: a randomized,placebo‐controlled FDG‐PET study 下载免费PDF全文
4.
Jesús Hermida J Antonio Casal J Carlos Tutor 《Clinical chemistry and laboratory medicine》2003,41(3):302-305
Using 3,3'-diclorophenolsulfoftaleinil N-acetyl-beta-D-glucosaminide as a substrate, the apparent activation energy of beta-N-acetylhexosaminidase (Hex) was determined in samples of plasma and urine, as well as in leukocyte and platelet lysates. Incubation with papain produced an increase in this thermodynamic variable for plasma Hex (precursor forms with high molecular mass) that would be caused by the proteolytic action of papain on the Hex A isoenzyme. However, digestion with papain did not significantly modify the activation energy of Hex in leukocyte and platelet lysates (mature enzymatic forms). In 11 healthy subjects and 28 patients with different renal diseases, no statistically significant differences were found with regard to the values obtained in cellular lysates for variations in the activation energy of urinary Hex, regardless of whether they presented normoalbuminuria, microalbuminuria or macroalbuminuria. These results support the hypothesis that even in patients with proteinuria, no significant amounts of plasma Hex precursor forms are found in urine samples, and the source of the enzyme activity is the kidney itself. 相似文献
5.
S B Wieslander B T Mortensen L Binderup N I Nissen 《European journal of haematology》1987,39(1):35-38
10 patients with CLL and 2 with CML were treated with gradually increasing doses of 1 alpha(OH)D3, up to 4 micrograms daily during 6 wk. 3 patients with preleukemia and 1 with myelofibrosis were treated with 2 micrograms daily of 1 alpha(OH)D3 for a prolonged period up to 17 wk. The treatment with 1 alpha (OH)D3 did not result in changes of disease parameters in any of the patients under study. Receptor studies for 1,25(OH)2D3 were performed in 8 CLL patients and revealed only 1 patient with increased specific receptor binding capacity. The maximum tolerable dose of 1 alpha(OH)D3 varied individually, but was in the range of 2-4 micrograms daily. 相似文献
6.
Two cases are presented in which the cause of small-bowel obstruction was enterolith originating in jejunal diverticula. 相似文献
7.
Raúl González-García Francisco J Rodríguez-Campo Verónica Escorial-Hernández Mario F Mu?oz-Guerra Jesús Sastre-Pérez Luis Naval-Gías José L Gil-Díez Usandizaga 《Journal of oral and maxillofacial surgery》2006,64(11):1587-1591
PURPOSE: Temporomandibular joint (TMJ) arthroscopy has been considered a safe surgical procedure in the treatment of TMJ derangement. However, it is not exempt from complications. This study evaluates the complications of arthroscopy in patients with internal derangement of TMJ. PATIENTS AND METHODS: Five hundred consecutive patients (670 joints) with TMJ derangement who underwent arthroscopy between 1995 and 2004 were retrospectively analyzed. All the patients were classified as II to V in the Wilkes classification. Lysis and lavage, electrocautery of the posterior ligament, injection of corticoids, injection of ethanolamine, myotomy of lateral pterygoid muscle attachments, myotomy and electrocautery, motor debridement, injection of sodium hyaluronate, and meniscal suture were performed in different patients. RESULTS: Complications were recognized during or immediately after the surgery. They were observed in 5 of 341 (1.26%) arthroscopies of the right TMJ and 4 of 329 (1.21%) arthroscopies of the left TMJ. A 1.34% complication rate was found in the whole series. No blood clots within the external auditory canal were observed. Bleeding within the superior TMJ space was observed in 57 cases (8.5%), 36 of them in the right TMJ and 21 in the left TMJ, but they were not considered as true complications. Lacerations of the external auditory canal were found in 2 cases (0.3%), with no cases of perforation of the tympanic membrane. Lesion of the auriculotemporal nerve was observed in a case. Paresia of the facial nerve was found in 4 cases (0.6%). Alteration of visual accuracy of the ipsilateral eye was also observed in a patient immediately after the surgery. CONCLUSION: Special care must be taken to reduce complications within the upper joint space by means of an adequate instrumentation and by paying attention to essential points of the arthroscopic technique. 相似文献
8.
9.
10.