全文获取类型
收费全文 | 1891篇 |
免费 | 117篇 |
国内免费 | 27篇 |
专业分类
耳鼻咽喉 | 27篇 |
儿科学 | 46篇 |
妇产科学 | 52篇 |
基础医学 | 251篇 |
口腔科学 | 13篇 |
临床医学 | 143篇 |
内科学 | 292篇 |
皮肤病学 | 13篇 |
神经病学 | 81篇 |
特种医学 | 584篇 |
外科学 | 91篇 |
综合类 | 20篇 |
预防医学 | 93篇 |
眼科学 | 47篇 |
药学 | 92篇 |
中国医学 | 2篇 |
肿瘤学 | 188篇 |
出版年
2021年 | 14篇 |
2019年 | 13篇 |
2018年 | 20篇 |
2017年 | 14篇 |
2016年 | 18篇 |
2015年 | 26篇 |
2014年 | 41篇 |
2013年 | 46篇 |
2012年 | 66篇 |
2011年 | 57篇 |
2010年 | 50篇 |
2009年 | 54篇 |
2008年 | 79篇 |
2007年 | 92篇 |
2006年 | 75篇 |
2005年 | 58篇 |
2004年 | 42篇 |
2003年 | 52篇 |
2002年 | 58篇 |
2001年 | 45篇 |
2000年 | 49篇 |
1999年 | 44篇 |
1998年 | 63篇 |
1997年 | 51篇 |
1996年 | 74篇 |
1995年 | 49篇 |
1994年 | 40篇 |
1993年 | 40篇 |
1992年 | 19篇 |
1991年 | 25篇 |
1990年 | 25篇 |
1989年 | 49篇 |
1988年 | 47篇 |
1987年 | 45篇 |
1986年 | 31篇 |
1985年 | 48篇 |
1984年 | 33篇 |
1983年 | 42篇 |
1982年 | 34篇 |
1981年 | 33篇 |
1980年 | 16篇 |
1978年 | 13篇 |
1977年 | 29篇 |
1976年 | 22篇 |
1975年 | 22篇 |
1974年 | 13篇 |
1973年 | 18篇 |
1972年 | 17篇 |
1971年 | 12篇 |
1967年 | 12篇 |
排序方式: 共有2035条查询结果,搜索用时 15 毫秒
1.
2.
Superior mesenteric vein thrombosis after splenectomy is very rare. In the case described of a patient presenting with acute abdominal pain the diagnosis was made primarily by real-time and Doppler ultrasonography. This reduced the time elapsing before it was recognized that angiography and subsequent thrombectomy were indicated. 相似文献
3.
4.
A randomized controlled trial of electromagnetic therapy in the primary care management of venous leg ulceration 总被引:1,自引:1,他引:0
OBJECTIVE: The aim was to establish the potential efficacy, tolerabilityand side-effect profile of electromagnetic therapy as an adjunctto conventional dressings in the treatment of venous leg ulcers. METHOD: A prospective, randomized, double blind controlled clinicaltrial was carried out in a dedicated leg ulcer clinic basedin one urban general practice. Nineteen patients with leg ulcersof confirmed venous aetiology were assessed. The main outcomemeasures were rate and scale of venous leg ulcer healing, changesin patient-reported pain levels, quality of life, degree ofmobility, side effect profile and acceptability to patientsand staff. RESULTS: Sixty-eight per cent of patients attending this dedicated clinicachieved improvements in the size of their ulcer (4, 21%, healedfully) and in reduced pain levels (P < 0.05) during the trial,despite the chronicity of ulcer histories. Patients treatedwith electromagnetic therapy at 800 Hz were found at day 50to have significantly greater healing (P < 0.05) and paincontrol (P < 0.05) than placebo therapy or treatment with600 Hz. All patients reported improved mobility at the end ofthe study. The electromagnetic therapy was well tolerated bypatients, with no differences between groups in reporting adverseevents, and proved acceptable to staff. CONCLUSION: Despite the small numbers in this pilot study, electromagnetictherapy provided significant gains in the healing of venousleg ulcers and reduction in pain. Keywords. Electromagnetic therapy, RCT, leg ulcers, primary care. 相似文献
5.
6.
7.
K Schunk C D Gerharz F X Schmid H Schild 《R?ntgen-Bl?tter; Zeitschrift für R?ntgen-Technik und medizinisch-wissenschaftliche Photographie》1987,40(11):373-375
After presenting an own case of a cavernous hemangioma of the mediastinum, the clinical pattern, differential diagnosis, diagnostic procedure (computed tomography), and therapy of this rare tumor form are described. 相似文献
8.
9.
Kinetics of specific anti-influenza antibody production by cultured lymphocytes from patients with systemic lupus erythematosus following influenza immunization. 总被引:1,自引:1,他引:1 下载免费PDF全文
D M Mitchell P Fitzharris R A Knight G C Schild M L Snaith 《Clinical and experimental immunology》1982,49(2):290-296
Specific antibody responses to influenza viral antigens produced by cultured peripheral blood mononuclear leucocytes stimulated with influenza virus or pokeweed mitogen (PWM) have been measured in seven patients with systemic lupus erythematosus (SLE) before and at time intervals after influenza immunization. Cells from two patients stimulated with influenza virus in vitro produced high levels of specific antibody 7 days after immunization. Cells from a third patient produced small amounts of specific antibody at day 14. No antibody was produced by cells from the remaining four patients. Responses were of short duration and were not detectable 1 month after immunization. Specific anti-influenza antibody was induced by PWM only from cells of those patients who responded to virus antigen although absolute levels of antibody produced were not as high. In six patients serum haemagglutination inhibiting antibody to influenza virus was measured, and all six had a greater than four-fold increase. The disparity between in vitro antibody production by peripheral blood mononuclear leucocytes and changes in serum antibody suggests that in patients with systemic lupus erythematosus, in vitro functions of peripheral blood lymphocytes do not reflect the immune system as a whole. 相似文献
10.
Sanjana VM; Johnston PA; Robertson CR; Jamison RL 《The American journal of physiology》1976,231(2):313-318