全文获取类型
收费全文 | 2063篇 |
免费 | 109篇 |
国内免费 | 75篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 84篇 |
妇产科学 | 32篇 |
基础医学 | 180篇 |
口腔科学 | 42篇 |
临床医学 | 245篇 |
内科学 | 383篇 |
皮肤病学 | 61篇 |
神经病学 | 99篇 |
特种医学 | 342篇 |
外科学 | 326篇 |
综合类 | 59篇 |
一般理论 | 1篇 |
预防医学 | 123篇 |
眼科学 | 29篇 |
药学 | 145篇 |
中国医学 | 3篇 |
肿瘤学 | 91篇 |
出版年
2021年 | 10篇 |
2020年 | 8篇 |
2019年 | 20篇 |
2018年 | 20篇 |
2017年 | 14篇 |
2016年 | 23篇 |
2015年 | 20篇 |
2014年 | 25篇 |
2013年 | 48篇 |
2012年 | 60篇 |
2011年 | 71篇 |
2010年 | 62篇 |
2009年 | 74篇 |
2008年 | 74篇 |
2007年 | 98篇 |
2006年 | 61篇 |
2005年 | 69篇 |
2004年 | 52篇 |
2003年 | 50篇 |
2002年 | 42篇 |
2001年 | 51篇 |
2000年 | 72篇 |
1999年 | 47篇 |
1998年 | 99篇 |
1997年 | 90篇 |
1996年 | 72篇 |
1995年 | 65篇 |
1994年 | 50篇 |
1993年 | 53篇 |
1992年 | 44篇 |
1991年 | 37篇 |
1990年 | 48篇 |
1989年 | 73篇 |
1988年 | 58篇 |
1987年 | 49篇 |
1986年 | 35篇 |
1985年 | 41篇 |
1984年 | 34篇 |
1983年 | 22篇 |
1982年 | 31篇 |
1981年 | 20篇 |
1980年 | 26篇 |
1979年 | 25篇 |
1978年 | 30篇 |
1977年 | 27篇 |
1976年 | 26篇 |
1975年 | 26篇 |
1974年 | 15篇 |
1972年 | 11篇 |
1971年 | 7篇 |
排序方式: 共有2247条查询结果,搜索用时 15 毫秒
11.
12.
SUMMARY A young patient presenting with splenomegaly and hypersplenism was inadvertently found to have selective IgA deficiency. There were no symptoms of immunodeficiency and the patient responded well to splenectomy, with return of blood counts to normal without adverse effects. No other cause for the hypersplenism was found. We postulate selective IgA deficiency as a cause of splenomegaly and hypersplenism. 相似文献
13.
14.
15.
16.
17.
CA Schroeter† L Kaas† JJ Waterval† PM Bos‡ HAM Neumann§ 《Journal of the European Academy of Dermatology and Venereology》2007,21(9):1170-1174
AIM: The aim of this pilot study was an investigation on photodynamic therapy (PDT) whether it is a good alternative for treating periungual and subungual warts of the hands. STUDY DESIGN: Twenty patients (mean age: 30.5 years) with a total of 40 periungual and subungual warts were treated with PDT. A photosensitizer, 20%delta-aminolevulinic acid was applied on the warts. After a mean incubation time of 4.6 h (SD: 1.2), the warts were irradiated with the VersaLight for 5-30 min (15.2 +/- 4.3 min). RESULTS: After a mean of 4.5 treatments a mean clearance of 100% was achieved in 90% of the patients. One patient (5%) showed a clearance of 50% and another showed no improvement. The subungual or periungual location of the wart had no influence on the number of treatments or end result (P > 0.05). There were two recurrences during the mean follow-up period of 5.9 months (SD: 7.6). Besides mainly pain and hyperpigmentation, most treatments had no side-effects. CONCLUSION: PDT can offer a good alternative for treating periungual warts of the hands. Larger studies are indicated. 相似文献
18.
JJ Piccininni 《The Journal of the Canadian Chiropractic Association》1994,38(4):223-226
This paper examines various devices used in strength building exercise programs. These include free weights, pulley machines, variable resistance weight machines, isokinetic units and elastic tubing and banding. Advantages and disadvantages of each are discussed and examined from the view point of the health care provider and the suitability of each type of device for prescribed progressive resistance exercise programs for patients. In addition to such practical aspects such as cost and maintenance, biomechanical factors, types of contraction elicited, ease of patient instruction and proprioception benefits are also compared in order to assist the clinician in selecting the most appropriate equipment for each individual patient. 相似文献
19.
20.
Kinetics of leukocyte sequestration in the lungs of acutely septic primates: a study using 111In-labeled autologous leukocytes 总被引:1,自引:0,他引:1
D H Hangen G M Segall E W Harney J H Stevens I R McDougall T A Raffin 《The Journal of surgical research》1990,48(3):196-203
To further clarify the role of leukocytes in the pathogenesis of ARDS, we studied the localization and kinetics of leukocyte migration using 111In-labeled autologous white cell scans (111In wbc scans) in four primates made acutely septic with infusions of Escherichia coli. Whole body images were obtained with a gamma camera and were acquired on computer every 15 min beginning immediately after the E. coli infusion. Simultaneous measurements of C5a and peripheral blood leukocyte count were also obtained. Within 5 min of initiating sepsis, three major events occurred: complement activation as measured by the production of C5a, a profound fall in peripheral leukocyte count, and a significant increase in the sequestration of leukocytes in the lungs. The pulmonary sequestration reached a peak at 15 min with a mean of 152% of baseline activity. This sequestration consisted of a population that was predominantly neutrophils. Damage to the pulmonary capillary endothelium was demonstrated by an increase in extravascular lung water. The results support a role for neutrophils and complement as mediators in the pathogenesis of ARDS. 相似文献