全文获取类型
收费全文 | 2408886篇 |
免费 | 173756篇 |
国内免费 | 4006篇 |
专业分类
耳鼻咽喉 | 35128篇 |
儿科学 | 81303篇 |
妇产科学 | 68278篇 |
基础医学 | 347526篇 |
口腔科学 | 68057篇 |
临床医学 | 206398篇 |
内科学 | 475084篇 |
皮肤病学 | 52464篇 |
神经病学 | 188974篇 |
特种医学 | 93383篇 |
外国民族医学 | 974篇 |
外科学 | 365023篇 |
综合类 | 49752篇 |
现状与发展 | 1篇 |
一般理论 | 658篇 |
预防医学 | 185755篇 |
眼科学 | 55617篇 |
药学 | 181580篇 |
3篇 | |
中国医学 | 4879篇 |
肿瘤学 | 125811篇 |
出版年
2018年 | 26435篇 |
2017年 | 19534篇 |
2016年 | 21515篇 |
2015年 | 24378篇 |
2014年 | 33233篇 |
2013年 | 50770篇 |
2012年 | 71073篇 |
2011年 | 75522篇 |
2010年 | 44159篇 |
2009年 | 41079篇 |
2008年 | 71390篇 |
2007年 | 76954篇 |
2006年 | 77290篇 |
2005年 | 75398篇 |
2004年 | 72819篇 |
2003年 | 70305篇 |
2002年 | 68929篇 |
2001年 | 108601篇 |
2000年 | 112310篇 |
1999年 | 95384篇 |
1998年 | 26731篇 |
1997年 | 23887篇 |
1996年 | 24253篇 |
1995年 | 22984篇 |
1994年 | 21733篇 |
1993年 | 20093篇 |
1992年 | 75901篇 |
1991年 | 74407篇 |
1990年 | 72962篇 |
1989年 | 70127篇 |
1988年 | 65079篇 |
1987年 | 63919篇 |
1986年 | 60280篇 |
1985年 | 57748篇 |
1984年 | 43376篇 |
1983年 | 36970篇 |
1982年 | 21891篇 |
1981年 | 19631篇 |
1979年 | 40162篇 |
1978年 | 28075篇 |
1977年 | 24208篇 |
1976年 | 22820篇 |
1975年 | 24927篇 |
1974年 | 29311篇 |
1973年 | 28312篇 |
1972年 | 26588篇 |
1971年 | 24534篇 |
1970年 | 23005篇 |
1969年 | 21657篇 |
1968年 | 20199篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
53.
54.
M Ugras† G Kocak† H Ozcan‡ 《Journal of the European Academy of Dermatology and Venereology》2006,20(9):1126-1128
Neu-Laxova syndrome (NLS) is a rare autosomal recessive syndrome, characterized by severe intrauterine growth retardation (IUGR), microcephaly, abnormal brain development, oedema and ichthyosis. It was first reported in 1971 by Neu et al. (Pediatrics 47: 610-612) and since then no more than 60 cases have been reported. A newborn girl delivered from a 29-year-old healthy mother was admitted to hospital with a thick membrane covering her body and dismorphic appearance. The diagnosis of NLS was made according to characteristic features. The syndrome is known to have a poor prognosis and the baby lived for 9 weeks. This case is one of the longest living cases of NLS and the fourth case reported from Turkey. 相似文献
55.
K. Dahan V. Audard F. Roudot-Thoraval D. Desvaux M. Abtahi H. Mansour M. Kumal P. Lang P. Grimbert 《American journal of transplantation》2006,6(7):1725-1730
The clinical outcome and appropriate management for patients showing 'borderline changes' on allograft biopsy after renal transplantation is still controversial. In an attempt to identify predictive factors of clinical outcome of patients with such lesions, we reviewed the clinical course of 91 patients with borderline changes. Multivariate analysis revealed significant and independent effects of histological stage (i + t < or = or > 2) and time to borderline changes (< or = or > 3 months after transplant) on serum creatinine levels at 1 year from borderline changes episodes (respectively, p = 0.04 and p = 0.02) and only a significant effect of time to borderline changes on serum creatinine levels at 2 years (p = 0.005). Renal function at 1 year and 2 years as 5- and 8-year graft survival were not significantly different in the group of patients treated with antirejection therapy (T group, n = 49) compared with the untreated group (UT group, n = 42). This study strongly suggests that borderline changes with histological score (i + t) > 2 and late episodes of borderline changes should be considered to be of poor prognosis. 相似文献
56.
Neurological Sciences - Brain plasticity, intended as the pattern of functional and structural changes in responses to environmental physiological or pathological events, is underlined by several... 相似文献
57.
58.
AIM: The intention was to investigate cerebrospinal fluid pressure (CSFP) and volume of cerebrospinal fluid (CSF) drained during and after thoracic- and thoracoabdominal aneurysm repair. The findings were related to the occurrence of postoperative neurologic deficits. METHODS: Twenty-nine patients (12 with thoracic and 17 with thoracoabdominal aortic aneurysm) were operated without shunting or extracorporeal circulation. For monitoring of CSFP an intrathecal catheter was placed in all patients. The volume of CSF withdrawn intraoperatively, on the day of operation as well as on the 1st and 2nd postoperative day was recorded. RESULTS: Twenty-six patients had no postoperative neurologic sequelae. One patient had postoperative paraplegia while 2 had paraparesis. The three patients with neurologic sequelae had higher CSFP intraoperatively than those without neurologic symptoms (P=0.04). Median CSFP during aortic cross-clamping was 19 mmHg and 10 mmHg and the median volumes of CSF drained on the day of operation 210 and 85 mL in the two groups, respectively. There was a significant positive correlation between CSFP and central venous pressure. CONCLUSIONS: A higher intraoperative CSFP was observed in patients with neurologic sequelae following thoracic- and thoracoabdominal aneurysm repair. Further, there was a tendency of higher volumes of CSF drained in this group of patients. Although, the series is too small to allow firm conclusions, it supports the view that CSFP monitoring and drainage is beneficial during thoracic- and thoracoabdominal aneurysm repair. 相似文献
59.
60.