全文获取类型
收费全文 | 5240篇 |
免费 | 261篇 |
国内免费 | 16篇 |
专业分类
耳鼻咽喉 | 40篇 |
儿科学 | 314篇 |
妇产科学 | 61篇 |
基础医学 | 485篇 |
口腔科学 | 246篇 |
临床医学 | 406篇 |
内科学 | 999篇 |
皮肤病学 | 161篇 |
神经病学 | 395篇 |
特种医学 | 208篇 |
外科学 | 817篇 |
综合类 | 103篇 |
一般理论 | 1篇 |
预防医学 | 234篇 |
眼科学 | 221篇 |
药学 | 368篇 |
中国医学 | 29篇 |
肿瘤学 | 429篇 |
出版年
2024年 | 5篇 |
2023年 | 37篇 |
2022年 | 71篇 |
2021年 | 178篇 |
2020年 | 87篇 |
2019年 | 140篇 |
2018年 | 150篇 |
2017年 | 138篇 |
2016年 | 150篇 |
2015年 | 181篇 |
2014年 | 263篇 |
2013年 | 321篇 |
2012年 | 479篇 |
2011年 | 522篇 |
2010年 | 277篇 |
2009年 | 225篇 |
2008年 | 316篇 |
2007年 | 321篇 |
2006年 | 264篇 |
2005年 | 299篇 |
2004年 | 256篇 |
2003年 | 196篇 |
2002年 | 183篇 |
2001年 | 38篇 |
2000年 | 31篇 |
1999年 | 41篇 |
1998年 | 34篇 |
1997年 | 26篇 |
1996年 | 24篇 |
1995年 | 16篇 |
1994年 | 19篇 |
1993年 | 17篇 |
1992年 | 20篇 |
1991年 | 14篇 |
1990年 | 13篇 |
1989年 | 16篇 |
1988年 | 10篇 |
1987年 | 12篇 |
1986年 | 8篇 |
1985年 | 11篇 |
1984年 | 10篇 |
1983年 | 8篇 |
1982年 | 8篇 |
1981年 | 6篇 |
1980年 | 9篇 |
1979年 | 6篇 |
1978年 | 11篇 |
1977年 | 7篇 |
1976年 | 6篇 |
1973年 | 6篇 |
排序方式: 共有5517条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Pankaj Hari Anand Srivastava Arun Kumar Gupta Rajendra N. Srivastava 《Pediatric nephrology (Berlin, Germany)》1997,11(4):497-498
Acute renal failure (ARF) developed in a 7-week-old infant due to bilateral candidal bezoars (fungal balls) causing obstruction
at the pelviureteric junction. The baby was born at term with an appropriate birthweight, and had been treated with broad-spectrum
antibiotics for respiratory distress and septicemia during the 1st week of life. Recovery from ARF followed renal decompression
with bilateral nephrostomy tube placement and parenteral administration of amphotericin B and 5-flucytosine.
Received August 21, 1996; received in revised form and accepted January 3, 1997 相似文献
5.
Ramshekhar N. Menon Nirav Sanghani Mahendra Javali Neeraj Jain Arun B. Shah 《Annals of Indian Academy of Neurology》2009,12(1):40-44
We report an unusual case of sporadic adult onset cerebellar ataxia with hypogonadism. A 40-year-old unmarried man presented with progressive ataxia and dysarthria along with complaints of non-development of secondary sexual characteristics and erectile dysfunction. There were complaints of intermittent diarrhea. Clinical examination revealed a pan-cerebellar syndrome with features of hypoandrogenism. No eye movement abnormalities were evident. There were signs of malabsorption. Investigations confirmed the presence of auto-antibodies found in celiac disease, and a duodenal biopsy confirmed the same. Hypoandrogenism was postulated to be due to hypergonadotropic hypogonadism which has been mentioned in a few patients of celiac disease. However, the pattern seen in our patient was of a hypogonadotropic hypogonadism. This is probably secondary to an autoimmune hypophysitis seen in some patients in the absence of other clinical manifestations. Autoantibody testing should be a diagnostic necessity in any adult with a sporadic cerebellar ataxia. 相似文献
6.
D. N. K. Sarma R. L. Khosa J. P. N. Chansauria M. Sahai 《Phytotherapy research : PTR》1995,9(8):589-590
The ethanol extracts of the roots of T. cordifolia Miers and C. asiatica Linn were observed to induce a marked protective action against an 8 h restraint stress induced ulcerization, the activity being comparable to that of diazepam. 相似文献
7.
8.
A 46-year-old man developed a symmetrical parkinsonian syndrome 7 weeks after large right temporal intracerebral haemorrhage resulting from a ruptured arteriovenous malformation. His signs included bradykinesia, rigidity, start hesitation, and poor postural reflexes, without a resting tremor. He also had signs of a Parinaud's syndrome. Computed tomography and magnetic resonance imaging of the brain demonstrated changes in the right temporal lobe associated with the haemorrhage but no abnormality of the basal ganglia or midbrain. Levodopa therapy produced a dramatic improvement within a few days of commencement. We postulate that the parkinsonism resulted from midbrain compression secondary to transtentorial herniation. Although parkinsonism is a rare complication of lobar intracerebral haemorrhage, it is important to recognise as it may be potentially treatable. 相似文献
9.
R Kashyap A Babbar I Sahai R Prakash N L Soni U P Chauhan 《Clinical nuclear medicine》1992,17(2):119-122
Combined Tc-99m MDP skeletal imaging and Tc-99m(V) DMSA whole body scans to detect metastases were performed during the follow-up of 30 patients who underwent surgery for breast carcinoma. Eight patients had normal Tc-99m MDP and Tc-99m(V) DMSA scans and were declared free of metastatic disease, further confirmed by no change in symptomatology over a 1-year follow-up period. Twenty-two patients had positive Tc-99m MDP scans with varied skeletal involvement. Tc-99m(V) DMSA scans showed matched areas of increased radiotracer concentration in bony metastases in 20 of these patients. Tc-99m(V) DMSA concentration was not seen in traumatic vertebral collapse or in coexistent osteoarthritic disease in vertebral metastatic involvement. Interestingly, Tc-99m(V) DMSA showed increased concentration in brain and liver metastases. Pentavalent Tc-99m(V) DMSA appears useful for detecting skeletal and soft-tissue metastases in breast carcinoma, and can improve the specificity of Tc-99m MDP bone scans in screening for bone metastases. 相似文献
10.
Owen M McKay Arun V Krishnan Mark Davis Matthew C Kiernan 《Clinical neurophysiology》2006,117(9):2064-2068
OBJECTIVE: To investigate the cause of the transient weakness that occurs in recessive myotonia congenita (RMC) following sustained muscle contraction. METHODS: Nerve excitability studies were performed on a 35-year-old male with RMC due to a novel 696+1G>A CLCN1 mutation. The median nerve was stimulated at the wrist and compound muscle action potentials (CMAPs) were recorded from abductor pollicis brevis (APB). Stimulus-response behaviour using two stimulus durations, threshold electrotonus to 100-ms polarizing currents, a current threshold relationship and the recovery of excitability following supramaximal stimulation were recorded at rest. Excitability parameters were also recorded before and after maximal voluntary contraction (MVC) of APB against resistance for 60s. Results were compared to data obtained from 12 normal controls. RESULTS: Baseline axonal excitability parameters were all normal, indicating that axonal function was normal at the point of stimulation. Following one minute of MVC, excitability parameters demonstrated a significant increase in threshold when compared to controls (RMC 54.9%; controls 15.5+/-3.1%). In the RMC patient, this increase in threshold was associated with a 39% reduction in the amplitude of the maximal CMAP, which remained unaffected in controls. CONCLUSIONS: The reduction in maximal CMAP is likely to represent muscle activation failure due to depolarization block, with the increase in threshold possibly reflecting a compensatory attempt by motor axons to overcome prolonged contraction-induced changes in the muscle membrane. SIGNIFICANCE: The prolonged recovery of excitability following sustained muscle contraction is likely to be a contributing factor to symptoms of weakness and fatigue experienced by RMC patients. 相似文献