全文获取类型
收费全文 | 3778篇 |
免费 | 267篇 |
国内免费 | 117篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 35篇 |
妇产科学 | 9篇 |
基础医学 | 417篇 |
口腔科学 | 38篇 |
临床医学 | 151篇 |
内科学 | 344篇 |
皮肤病学 | 355篇 |
神经病学 | 78篇 |
特种医学 | 54篇 |
外科学 | 212篇 |
综合类 | 346篇 |
现状与发展 | 1篇 |
预防医学 | 168篇 |
眼科学 | 37篇 |
药学 | 1373篇 |
中国医学 | 423篇 |
肿瘤学 | 120篇 |
出版年
2024年 | 5篇 |
2023年 | 25篇 |
2022年 | 60篇 |
2021年 | 96篇 |
2020年 | 93篇 |
2019年 | 99篇 |
2018年 | 98篇 |
2017年 | 80篇 |
2016年 | 89篇 |
2015年 | 113篇 |
2014年 | 195篇 |
2013年 | 213篇 |
2012年 | 252篇 |
2011年 | 261篇 |
2010年 | 252篇 |
2009年 | 196篇 |
2008年 | 234篇 |
2007年 | 229篇 |
2006年 | 197篇 |
2005年 | 179篇 |
2004年 | 166篇 |
2003年 | 148篇 |
2002年 | 119篇 |
2001年 | 119篇 |
2000年 | 85篇 |
1999年 | 75篇 |
1998年 | 56篇 |
1997年 | 46篇 |
1996年 | 57篇 |
1995年 | 51篇 |
1994年 | 49篇 |
1993年 | 25篇 |
1992年 | 36篇 |
1991年 | 18篇 |
1990年 | 18篇 |
1989年 | 13篇 |
1988年 | 20篇 |
1987年 | 15篇 |
1986年 | 10篇 |
1985年 | 16篇 |
1984年 | 14篇 |
1983年 | 7篇 |
1982年 | 7篇 |
1981年 | 8篇 |
1980年 | 7篇 |
1979年 | 4篇 |
1978年 | 3篇 |
1977年 | 2篇 |
1971年 | 1篇 |
1969年 | 1篇 |
排序方式: 共有4162条查询结果,搜索用时 15 毫秒
41.
42.
Background: Hybrid, combined or mixed bariatric surgery is the combination of a degree of ‘malabsorption’ (as achieved by the intestinal bypass) with a ‘rrestriction’
(as achieved by gastric bypass or gastroplasty), thereby simultaneously reducing the absorption of fats in the small bowel
and decreasing the intake of food. Methods: A modification of the bilio-pancreatic diversion (BPD) with a duodenal switch
procedure, vertical lineal gastrectomy and preservation of the pylorus, has been used in 23 patients. The antropyloric pump
and 4 cm of the duodenum are left intact to preserve physiologic gastric emptying and to prevent anastomotic ulcer. The use
of staplers and continuous running sutures reduces surgical risks and operative time. Results: One patient, converted from
a vertical gastroplasty, had an intrathoracic esophageal perforation and died of multisystemic organ failure, a mortality
rate of 4.5%. One patient had a partial dehiscence of the laparotomy wound. Three patients developed subcutaneous seromas.
Mean weight losses during the first 4 months were 13, 11, 6 and 5 kg, with a loss of 70% of excess weight in patients approaching
1 year. No patient needs treatment for diarrhea. No serious secondary side-effects have been detected. Conclusion: This operation
appears to result in very satisfactory weight loss, improved quality of life, and a low incidence of complications. 相似文献
43.
Aortopulmonary collateral arteries sometimes complicate cyanotic congenital heart defects. Combined with a relevant left-right shunt, this could result in massive airway bleeding during and after corrective surgery. A preoperatively diagnosed 1.2 mm small aortopulmonary collateral artery in a newborn suffering from transposition of the great arteries caused life-threatening airway bleeding during surgery. Postoperative extracorporeal membrane oxygenation (ECMO) was necessary, and coil embolization was performed on ECMO to terminate pulmonary bleeding. 相似文献
44.
介绍了基于Windows3.x环境下,用Delphi开发软件,结合面象对象技术、数据库技术、Windows帮助文件系统技术,开发S12数字程控交换机人机命令信息查询系统的过程和方法.并对超文本技术、面向对象技术、数据库技术进行了阐述.通过试运行,验证了本系统的高速、方便、安全、兼容性好等特点. 相似文献
45.
Remarks on polyphenolic compounds has been arisen since past few years. The flavonoids appears to be the important groups of compounds with their capability to inhibit DNA damage, lipid peroxidation, to quench free radicals and, at least, anticarcinogenic and antiproliferative effects. On the other hand, their mechanism of action is still unexplained. Apigenin and luteolin are the most wide-spread flavones and they exhibited to be useful in chemoprevention. UV spectrometric and DC polarographic studies on these two compounds have been carried out with regard to changing pH. The most significant changes were observed at basic pH. These results could aid to elucidation of their mechanism of action as pH is one of the important factors for bioprocesses passing in living organisms. 相似文献
46.
Hypomanic episodes in two cases involving depressed patients (bipolar II) were observed after admission to an open psychiatric ward. The patients had not exhibited any prior (hypo)manic episodes during outpatient treatment. Thus, manic switching was thought to have been caused by the psychological effects brought on by the change in environment due to hospital admission. Hospital admission was believed to have been an unloading from their stressful lives, given that the affective state of both patients prior to admission was characterized by depression resulting from work-related stress. The close relationship between the patients and the predominantly female nursing staff may have triggered a psychological regression in both patients. These factors appear to have led to the hypomanic switching. 相似文献
47.
48.
49.
50.