全文获取类型
收费全文 | 236390篇 |
免费 | 7531篇 |
国内免费 | 4813篇 |
专业分类
耳鼻咽喉 | 1610篇 |
儿科学 | 7197篇 |
妇产科学 | 3578篇 |
基础医学 | 23636篇 |
口腔科学 | 2740篇 |
临床医学 | 20690篇 |
内科学 | 40254篇 |
皮肤病学 | 1260篇 |
神经病学 | 19778篇 |
特种医学 | 11111篇 |
外国民族医学 | 52篇 |
外科学 | 34960篇 |
综合类 | 13306篇 |
现状与发展 | 19篇 |
一般理论 | 5篇 |
预防医学 | 22343篇 |
眼科学 | 4585篇 |
药学 | 16183篇 |
39篇 | |
中国医学 | 4103篇 |
肿瘤学 | 21285篇 |
出版年
2024年 | 270篇 |
2023年 | 1173篇 |
2022年 | 2730篇 |
2021年 | 3429篇 |
2020年 | 2617篇 |
2019年 | 2269篇 |
2018年 | 23953篇 |
2017年 | 19294篇 |
2016年 | 21319篇 |
2015年 | 3850篇 |
2014年 | 4458篇 |
2013年 | 3878篇 |
2012年 | 11723篇 |
2011年 | 26053篇 |
2010年 | 21752篇 |
2009年 | 13823篇 |
2008年 | 22655篇 |
2007年 | 24727篇 |
2006年 | 3609篇 |
2005年 | 5189篇 |
2004年 | 5298篇 |
2003年 | 6211篇 |
2002年 | 4039篇 |
2001年 | 1646篇 |
2000年 | 1824篇 |
1999年 | 1792篇 |
1998年 | 1189篇 |
1997年 | 1161篇 |
1996年 | 781篇 |
1995年 | 738篇 |
1994年 | 735篇 |
1993年 | 449篇 |
1992年 | 598篇 |
1991年 | 507篇 |
1990年 | 509篇 |
1989年 | 399篇 |
1988年 | 367篇 |
1987年 | 293篇 |
1986年 | 238篇 |
1985年 | 209篇 |
1984年 | 116篇 |
1983年 | 80篇 |
1982年 | 69篇 |
1981年 | 41篇 |
1980年 | 58篇 |
1979年 | 44篇 |
1938年 | 61篇 |
1934年 | 34篇 |
1932年 | 57篇 |
1930年 | 47篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
Koichi Murata Yasuaki Nakagawa Takashi Suzuki Masahiko Kobayashi Seiya Kotani Takashi Nakamura 《Knee surgery, sports traumatology, arthroscopy》2007,15(10):1261-1263
Intraosseous ganglia of the glenoid are rare, and their etiology is unknown. This report describes a case of an intraosseous
ganglion about to cause fracture of the glenoid. The patient was a 61-year-old woman with a painful left shoulder with a limited
range of motion. Her symptoms did not improve after non-operative treatment. Arthroscopic examination showed a cartilage defect
and erosion in the posteroinferior portion of the glenoid, behind which computed tomography (CT) showed a cystic lesion of
the glenoid. There was no communication between the cyst and the joint space. The patient was treated by curettage and an
autogenous cancellous bone graft from the iliac crest. Two years after the operation, the patient was almost free from pain,
and CT showed good integration of the bone graft. 相似文献
102.
103.
104.
105.
脊柱侧弯是青少年的多发病,发病率约1%,不但影响美观,也给患者心理健康造成危害,而且严重影响患者的心肺功能,甚至导致截瘫,目前最好的治疗方法是早期手术. 相似文献
106.
107.
108.
Lenka A. Taylor Jann Arends Arwen K. Hodina Clemens Unger Ulrich Massing 《Lipids in health and disease》2007,6(1):17
Background
It has been observed that ras-transformed cell lines in culture have a higher phosphatidylcholine (PC) biosynthesis rate as well as higher PC-degradation rate (increased PC-turnover) than normal cells. In correspondence to these findings, the concentrations of the PC-degradation product lyso-phosphatidylcholine (LPC) in cancer patients were found to be decreased. Our objective was the systematic investigation of the relationship between LPC and inflammatory and nutritional parameters in cancer patients. Therefore, plasma LPC concentrations were assessed in 59 cancer patients and related to nutritional and inflammatory parameters. To determine LPC in blood plasma we developed and validated a HPTLC method. 相似文献109.
110.
C Y Chai A M Lin C K Su S R Hu C Yuan L S Kao J S Kuo D S Goldstein 《Journal of the autonomic nervous system》1991,33(1):35-46
Effects of stimulation of brainstem sites on hemodynamics and plasma catecholamine levels were assessed in cats under chloralose-urethane anesthesia. Pressor areas of the dorsal medulla (DM) and ventrolateral medulla (VLM) and the depressor area of the paramedian reticular nucleus (PRN) were stimulated electrically using a monopolar electrode, or chemically using sodium glutamate microinjection. Plasma levels of norepinephrine (NE) and epinephrine (EPI) were measured in caval blood above the adrenal veins. Electrical stimulation of the DM and VLM produced increases in blood pressure and in plasma NE and EPI levels that were enhanced after acute vagotomies. The NE and EPI responses were attenuated after acute, bilateral adrenalectomies, confirming augmented adrenomedullary secretion, whereas the pressor responses were intact. Injection of sodium glutamate into the same pressor regions of the DM or VLM also produced pressor responses and elevated plasma catecholamine levels, indicating that the responses resulted from activation of neuronal perikarya. Stimulation of the PRN attenuated pressor and catecholamine responses during stimulation of the DM and VLM. The results indicate that pressor responses during stimulation of the DM and VLM are due at least partly to activation of perikarya in these regions, are associated with but not dependent on adrenomedullary activation, and are enhanced after vagotomy; and that neurons of the PRN exert inhibitory modulation of the pressor and adrenomedullary responses during stimulation of VLM and DM. 相似文献