全文获取类型
收费全文 | 1117篇 |
免费 | 139篇 |
国内免费 | 49篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 97篇 |
妇产科学 | 18篇 |
基础医学 | 99篇 |
口腔科学 | 44篇 |
临床医学 | 102篇 |
内科学 | 329篇 |
皮肤病学 | 29篇 |
神经病学 | 19篇 |
特种医学 | 189篇 |
外科学 | 62篇 |
综合类 | 97篇 |
预防医学 | 75篇 |
眼科学 | 9篇 |
药学 | 68篇 |
中国医学 | 3篇 |
肿瘤学 | 56篇 |
出版年
2023年 | 15篇 |
2022年 | 9篇 |
2021年 | 24篇 |
2020年 | 21篇 |
2019年 | 8篇 |
2018年 | 19篇 |
2017年 | 41篇 |
2016年 | 37篇 |
2015年 | 30篇 |
2014年 | 64篇 |
2013年 | 69篇 |
2012年 | 24篇 |
2011年 | 21篇 |
2010年 | 62篇 |
2009年 | 68篇 |
2008年 | 25篇 |
2007年 | 63篇 |
2006年 | 31篇 |
2005年 | 21篇 |
2004年 | 19篇 |
2003年 | 9篇 |
2002年 | 8篇 |
2001年 | 27篇 |
2000年 | 12篇 |
1999年 | 16篇 |
1998年 | 78篇 |
1997年 | 65篇 |
1996年 | 60篇 |
1995年 | 51篇 |
1994年 | 46篇 |
1993年 | 43篇 |
1992年 | 10篇 |
1991年 | 7篇 |
1990年 | 16篇 |
1989年 | 21篇 |
1988年 | 24篇 |
1987年 | 14篇 |
1986年 | 20篇 |
1985年 | 17篇 |
1984年 | 10篇 |
1983年 | 12篇 |
1982年 | 9篇 |
1981年 | 4篇 |
1980年 | 8篇 |
1979年 | 4篇 |
1978年 | 6篇 |
1977年 | 5篇 |
1976年 | 12篇 |
1975年 | 10篇 |
1955年 | 4篇 |
排序方式: 共有1305条查询结果,搜索用时 46 毫秒
1.
By injecting small amounts of CO2 through a needle, one can move bowel or bladder from the intended path of instruments during interventional procedures. The technique worked well in six of seven cases in the pelvis and retroperitoneum; it was not effective in the mediastinum or midabdomen (n = 6). 相似文献
2.
外科医生和手术室人员经常接触手术设备产生的烟气,病人也会暴露于烟气中,特别是腹腔镜手术中产生的烟气滞留于腹腔内这一密闭空间并被吸收.这些烟气是一种与香烟烟气相似的毒性物质,然而对这种毒性物质的影响还未引起足够重视.应该采取必要措施尽可能减少手术中烟气的不良影响. 相似文献
3.
4.
5.
6.
7.
8.
Calciphylaxis – a topical overview 总被引:3,自引:0,他引:3
G Arseculeratne† AT Evans‡ SM Morley† 《Journal of the European Academy of Dermatology and Venereology》2006,20(5):493-502
'Calciphylaxis', a calcification syndrome associated with ischaemic cutaneous necrosis, is acquired naturally in humans in disease states. It is a life and limb-threatening complication, usually observed in patients with renal disease and secondary hyperparathyroidism, but known to occur in the absence of renal or parathyroid disease. The reported mortality rate, which ranges from 60-80%, relates to wound infection, sepsis and organ failure. It is a small-vessel vasculopathy, which is estimated to occur in about 4% of haemodialysis patients. Clinically, violaceous, reticulate areas of cutaneous necrosis and eschar may be evident, particularly in the extremities. In addition to the clinical picture, a raised calcium phosphorous product, an elevated parathyroid hormone level, radiographic evidence of vessel and soft-tissue calcification and the finding of mural calcification affecting small arteries and arterioles on histopathology help to confirm the diagnosis of this entity which generally has a poor prognosis. A high index of suspicion and an active multidisciplinary management approach, with rigorous attention to wound care and prevention of sepsis, are vital in the management of these patients. In this overview, we discuss the pathophysiology, clinical features and associations, risk factors, diagnosis and management issues relating to calciphylaxis. 相似文献
9.
AMADORI DINO; NANNI ORIANA; RICCI MIRANDA; FALCINI FABIO; DECARLI ADRIANO; PALLI DOMENICO; BUIATTI EVA 《European journal of public health》1995,5(3):209-214
The aim of the present study is to evaluate drawbacks and advantagesof the choice of hospital versus population controls in a casecontrol study on diet and cancer through the analysis of a retrospectivestudy on diet and gastric cancer (GC) conducted in Forli, Italy,involving 232 cases, 430 population controls and 252 hospitalizedcontrols. The present paper reports the comparison of resultson diet and GC risk obtained using the 2 types of controls.Population controls tended, in general, to eat all kinds offoods slightly more frequently (bread, pasta, cold cuts, freshfish, seasoned cheeses, legumes, garlic, onions and preservedfruits), with the exception of cooked vegetables, which werereported less frequently by population than by hospital controls.ORs for specific foods adjusted for confounders and other foodswere consistent in the separate models including populationand hospital controls respectively for all food groups, withthe exception of cooked vegetables which represented a protectivefactor only when hospital controls were considered (high consumers,population controls: adjusted, OR=0.9, trend p value 0.54; highconsumers, hospital controls, adjusted OR=0.5, trend p value<0.01). Hospital controls were slightly less often currentsmokers (22.6 versus 30.0%) and more often regular wine drinkers(57.5 versus 47.8%) compared with population controls, but noneof these variables was associated with GC risk. The main resultsin this study were consistent using both types of controls,nevertheless the distribution of some dietary variables notrelated to the disease under study differed between the 2 controlgroups, suggesting some caution in the use of hospital controlswhen studying diseases other than GC. 相似文献
10.
Bastiaan R Klarenbeek Alexander AFA Veenhof Elly SM de Lange Willem A Bemelman Roberto Bergamaschi Piet Heres Antonio M Lacy Wim T van den Broek Donald L van der Peet Miguel A Cuesta 《BMC surgery》2007,7(1):16