全文获取类型
收费全文 | 2510篇 |
免费 | 111篇 |
国内免费 | 16篇 |
专业分类
耳鼻咽喉 | 8篇 |
儿科学 | 52篇 |
妇产科学 | 92篇 |
基础医学 | 349篇 |
口腔科学 | 36篇 |
临床医学 | 169篇 |
内科学 | 414篇 |
皮肤病学 | 28篇 |
神经病学 | 334篇 |
特种医学 | 52篇 |
外科学 | 336篇 |
综合类 | 5篇 |
预防医学 | 344篇 |
眼科学 | 27篇 |
药学 | 225篇 |
中国医学 | 2篇 |
肿瘤学 | 164篇 |
出版年
2022年 | 12篇 |
2021年 | 48篇 |
2020年 | 14篇 |
2019年 | 29篇 |
2018年 | 48篇 |
2017年 | 41篇 |
2016年 | 48篇 |
2015年 | 51篇 |
2014年 | 72篇 |
2013年 | 80篇 |
2012年 | 161篇 |
2011年 | 167篇 |
2010年 | 89篇 |
2009年 | 73篇 |
2008年 | 136篇 |
2007年 | 165篇 |
2006年 | 153篇 |
2005年 | 170篇 |
2004年 | 155篇 |
2003年 | 140篇 |
2002年 | 139篇 |
2001年 | 36篇 |
2000年 | 36篇 |
1999年 | 27篇 |
1998年 | 25篇 |
1997年 | 21篇 |
1996年 | 11篇 |
1992年 | 24篇 |
1991年 | 25篇 |
1990年 | 20篇 |
1989年 | 14篇 |
1988年 | 20篇 |
1987年 | 23篇 |
1986年 | 19篇 |
1985年 | 24篇 |
1984年 | 12篇 |
1983年 | 14篇 |
1982年 | 11篇 |
1979年 | 24篇 |
1978年 | 17篇 |
1977年 | 9篇 |
1976年 | 15篇 |
1975年 | 22篇 |
1974年 | 18篇 |
1973年 | 20篇 |
1972年 | 11篇 |
1969年 | 10篇 |
1968年 | 11篇 |
1932年 | 9篇 |
1931年 | 12篇 |
排序方式: 共有2637条查询结果,搜索用时 15 毫秒
1.
T Juhás 《Ceskoslovenská oftalmologie》1990,46(5):367-370
Based on repeated fluoroangiographic examinations in a group of 28 children with type I diabetes mellitus the authors observed progressing diabetic retinal changes. At the end of the three-year observation period they found progress in 32% of the children. They investigated influence of risk factors such as age, duration of the basic disease, its metabolic compensation, sex and HLA typing on the development of diabetic retinopathy. 相似文献
2.
J Strausz S Kis J Juhász A Bede J Elek Z Monostori G Nagy I Repa 《Orvosi hetilap》1992,133(36):2293-2296
Six patients with obstruction of the trachea were treated with silicone rubber endothracheal stents implanted with flexible bronchoscope. In every case the stent caused significant clinical improvement of the ventilation. At the postintubation stenosis the stent can result a final recovery, at the malignant processes the implantation seems to be a new palliative method. 相似文献
3.
4.
5.
During a period of thirty years (1959-1989) 374 patients underwent surgery for differentiated thyroid carcinoma at the 1st Department of Surgery of the University Medical School in Debrecen. Distant metastases were found in the lungs or bones in 36 patients (9.6%). In 20 patients the first clinical sign of the primary disease was the distant metastasis. The aspects of surgical treatment depended on whether the metastases were solitary or multiple, capable or uncapable of radioiodine uptake. Whereas the majority of pulmonary metastases respond well to 131I-treatment the therapy of bone metastases is multidisciplinary. The 5-year survival rate was 47%, the 10-year one 19%. 相似文献
6.
After giving a short account on the possible ways of male contraception, the authors outline the administration of surgical sterilization and its professional follow-up based on their own experience. Their suggestions concerning legal regulations aim, on the one hand, at the extension of the topic, on the other hand at supporting the specialists interested in surgical contraception. 相似文献
7.
Contralateral approach to bilateral and ophthalmic aneurysms 总被引:7,自引:0,他引:7
In a previous survey, we found a high incidence of fatal rupture of an unclipped aneurysm in patients with multiple aneurysms. To deal with this problem, we introduced a more vigorous technique that accesses aneurysms previously considered unapproachable during one operating session. Attempts were made to clip middle cerebral and ophthalmic aneurysms contralateral to the operative exposure. We have successfully clipped contralateral aneurysms of the posterior communicating artery when bilateral aneurysms were present. We have also used this contralateral approach successfully with single ophthalmic and proximal carotid aneurysms that pointed medially. We review the cases of 39 patients with 43 intracranial aneurysms operated from the contralateral side and present the surgical technique in relation to the angiographic findings. 相似文献
8.
Eishi Asano Temenuzhka Mihaylova Csaba Juhász Sandeep Sood Harry T Chugani 《Clinical neurophysiology》2007,118(6):1360-1368
OBJECTIVE: To determine how sleep with central spindles alters the spatial distribution of interictal spike frequency in children with intractable focal seizures, and whether such children have spindles arising from the medial temporal region in addition to the frontal-central region. METHODS: Seventeen children (age: 7 months-17 years) were studied using extraoperative electrocorticography (ECoG). RESULTS: Overall spike frequency across the subdural electrodes was greater during sleep with central spindles compared to wakefulness. In 13 children showing at least 1 spike/min in an electrode, the spatial distribution of spike frequency was similar during wakefulness and sleep; in addition, the spike frequency was greater in the seizure onset zones compared to the non-onset areas, regardless of wakefulness or sleep. Spindles were identified in the medial temporal region during sleep with central spindles in all 17 children. CONCLUSION: Overall spike frequency may be increased by sleep with spindles, but the spatial distribution of spike frequency appears similar during wakefulness and sleep in children with intractable focal seizures. SIGNIFICANCE: Both awake and sleep ECoG may be useful to predict seizure onset zones in children with intractable focal epilepsy. Medial temporal spindles are present in some children with focal epilepsy. 相似文献
9.
10.
Füst G Arason GJ Kramer J Szalai C Duba J Yang Y Chung EK Zhou B Blanchong CA Lokki ML Bödvarsson S Prohászka Z Karádi I Vatay A Kovács M Romics L Thorgeirsson G Yu CY 《International immunology》2004,16(10):1507-1514
The genetic basis for addiction to tobacco smoking--particularly that of the perception of olfactory stimuli that may be important in reinforcing smoking addiction--is largely unknown. A cluster of genes for olfactory receptors is in close proximity to the MHC region on chromosome 6. Polymorphisms of MHC class III genes (RCCX modules, TNFA promoter polymorphisms) were determined in 101 healthy subjects and 232 coronary artery disease (CAD) patients from Hungary with defined tobacco smoking habits. A highly significant association between ever smoking (past + current smokers) and a specific MHC haplotype was observed (odds ratios = 2.14-4.13; P-values = 0.012 to <0.001). This haplotype is characterized by the presence of C4A null alleles and a solitary short C4B gene linked to the TNF2 allele of the promoter for TNFA gene. This haplotype occurred more frequently in the ever smokers than in the never smokers [odds ratio: 4.97 (1.96-12.62); P = 0.001], and such associations were stronger in women (odds ratio = 13.6) than in men (odds ratio = 2.79). An independent study of complement C4 protein polymorphism and smoking habits in Icelandic subjects (n = 351) yielded similar and confirmative results. Considering the documented link between olfactory stimuli and smoking in females, and the presence of a cluster of odorant receptor genes close to the MHC class I region, our findings implicate a potential role of the MHC-linked olfactory receptor genes in the initiation of smoking. 相似文献