全文获取类型
收费全文 | 30892篇 |
免费 | 2629篇 |
国内免费 | 176篇 |
专业分类
耳鼻咽喉 | 318篇 |
儿科学 | 1076篇 |
妇产科学 | 704篇 |
基础医学 | 3605篇 |
口腔科学 | 639篇 |
临床医学 | 2910篇 |
内科学 | 6576篇 |
皮肤病学 | 546篇 |
神经病学 | 2399篇 |
特种医学 | 1003篇 |
外科学 | 4672篇 |
综合类 | 800篇 |
一般理论 | 14篇 |
预防医学 | 2038篇 |
眼科学 | 1306篇 |
药学 | 2318篇 |
1篇 | |
中国医学 | 131篇 |
肿瘤学 | 2641篇 |
出版年
2023年 | 192篇 |
2022年 | 275篇 |
2021年 | 737篇 |
2020年 | 471篇 |
2019年 | 696篇 |
2018年 | 799篇 |
2017年 | 566篇 |
2016年 | 657篇 |
2015年 | 750篇 |
2014年 | 1028篇 |
2013年 | 1209篇 |
2012年 | 1984篇 |
2011年 | 2043篇 |
2010年 | 1179篇 |
2009年 | 1025篇 |
2008年 | 1786篇 |
2007年 | 1736篇 |
2006年 | 1615篇 |
2005年 | 1541篇 |
2004年 | 1547篇 |
2003年 | 1368篇 |
2002年 | 1220篇 |
2001年 | 1129篇 |
2000年 | 1023篇 |
1999年 | 877篇 |
1998年 | 307篇 |
1997年 | 237篇 |
1996年 | 212篇 |
1995年 | 213篇 |
1994年 | 189篇 |
1993年 | 168篇 |
1992年 | 513篇 |
1991年 | 479篇 |
1990年 | 438篇 |
1989年 | 402篇 |
1988年 | 362篇 |
1987年 | 336篇 |
1986年 | 331篇 |
1985年 | 326篇 |
1984年 | 222篇 |
1983年 | 206篇 |
1982年 | 140篇 |
1981年 | 105篇 |
1980年 | 111篇 |
1979年 | 161篇 |
1978年 | 93篇 |
1977年 | 103篇 |
1976年 | 70篇 |
1974年 | 85篇 |
1973年 | 71篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
122.
运动性疲劳中医肾虚证的辨证分型及其诊断标准 总被引:1,自引:0,他引:1
目的:阐明运动性疲劳中医肾虚证的主要证候及辨证标准。
方法:于2003-07/2004-01选择湖南省水上运动训练基地的皮划赛艇运动员和省体工大队的田径运动员共199名为研究对象。将中医辨证理论方法与流行病学调研疗法有机结合,统一诊断标准和资料处理方法,分析肾虚各证候构成比,进行聚类分析,观察单一症状出现频次、症状组合出现频次。
结果:纳入受试对象199名,均进入结果分析。①肾虚常见证候有腰脊酸痛,头晕目眩,精神疲倦,四肢乏力,胫膝酸软,气短自汗,五心烦热,口干少津,畏寒肢冷,小便清长,夜尿频多,少寐多梦。②肾虚各证候构成比:肾气虚(51.26%)、肾阴阳两虚(37.69%)、肾阳虚(6.53%)、肾阴虚(4.52%)。③聚类分析:第一类为腰脊酸痛,精神疲倦,四肢乏力,气短自汗;第二类为头晕目眩,胫膝酸软,畏寒肢冷,小便清长,夜尿频多;第三类为五心烦热,口干少津;第四类为少寐多梦。④参与组合频次大于50%的症状主要是:精神疲倦、四肢乏力、腰脊酸痛、头晕目眩、气短,这5个症状也是单个症状频次大于80%的。
结论:运动性疲劳中医肾虚证的常见证候为肾气虚、肾阴阳两虚、肾阳虚、肾阴虚。而肾气虚是运:动性疲劳中医肾虚的主要证候。精神疲倦、四肢乏力、腰脊酸痛、头晕目眩、气短这5个症状可以作为运动性疲劳肾气虚辨证标准中的主要症状。 相似文献
123.
The effects of the bisbenzylisoquinoline alkaloids tetrandrine and berbamine on the action of IL-1, TNF and PAF were investigated in the rat subcutaneous air pouch model of inflammation. Both compounds were equipotent in the suppression of leukocyte infiltration into air pouches induced by IL-1 and TNF, with ED50 values in the range 20–30 mg/kg/3 days. Both were also equiptent in suppression of PMN infiltration induced by PAF with ED50 values in the same range as that for IL-1 and TNF. However, tetrandrine was more potent than berbamine as a suppressant of PAF-induced MNC infiltration, but much less potent than berbamine in carageenen-induced PMN infiltration. These results suggest that these bisbenzylisoquinolines may have value in the therapy of chronic inflammatory diseases where IL-1, TNF and PAF have a role in pathogenesis. 相似文献
124.
125.
翁诗全 《中药新药与临床药理》1993,4(3):22-25
复方珍珠口服液由珍珠、黄精、枸杞子、何首乌、熟地黄等多种补益中药材组成,提取制备而成的口服液,经临床144例验证表明,该口服液具有滋补肝肾、养血活颜、延缓衰老的功能。对肝肾两虚、头晕眼花、健忘、夜尿、病后体弱,高胆固醇、高血压症有较好的疗效;其中治疗肾虚证总有效率为95.83%,治疗高血压症总有效率为80.9%,治疗高胆固醇总有效率为71.47%。 相似文献
126.
V Wong 《Brain & development》1992,14(4):276-277
We report the first Chinese boy with adrenoleukodystrophy (ALD) who presented with hyperpigmentation, behavioral change and demyelination shown in magnetic resonance imaging of the brain. ALD was confirmed by the elevation of very long chain fatty acid in the serum and biochemical evidence of adrenal insufficiency. A trial of special diet with restriction of very long chain fatty acid and addition of glyceryl trierucate/glycerol trioleate oil (GTEO or Lorenzo's oil) failed to prevent clinical deterioration. The child had progressive visual loss and spastic tetraparesis despite dietary manipulation, adrenal steroid replacement and intravenous gammaglobulin treatment. 相似文献
127.
SRTR Center-Specific Reporting Tools: Posttransplant Outcomes 总被引:3,自引:2,他引:1
D. M. Dickinson T. H. Shearon J. O'Keefe H. -H. Wong C. L. Berg J. D. Rosendale F. L. Delmonico R. L. Webb R. A. Wolfe 《American journal of transplantation》2006,6(5P2):1198-1211
Measuring and monitoring performance—be it waiting list and posttransplant outcomes by a transplant center, or organ donation success by an organ procurement organization and its partnering hospitals—is an important component of ensuring good care for people with end-stage organ failure. Many parties have an interest in examining these outcomes, from patients and their families to payers such as insurance companies or the Centers for Medicare and Medicaid Services; from primary caregivers providing patient counseling to government agencies charged with protecting patients.
The Scientific Registry of Transplant Recipients produces regular, public reports on the performance of transplant centers and organ procurement organizations. This article explains the statistical tools used to prepare these reports, with a focus on graft survival and patient survival rates of transplant centers—especially the methods used to fairly and usefully compare outcomes of centers that serve different populations. The article concludes with a practical application of these statistics—their use in screening transplant center performance to identify centers that may need remedial action by the OPTN/UNOS Membership and Professional Standards Committee. 相似文献
The Scientific Registry of Transplant Recipients produces regular, public reports on the performance of transplant centers and organ procurement organizations. This article explains the statistical tools used to prepare these reports, with a focus on graft survival and patient survival rates of transplant centers—especially the methods used to fairly and usefully compare outcomes of centers that serve different populations. The article concludes with a practical application of these statistics—their use in screening transplant center performance to identify centers that may need remedial action by the OPTN/UNOS Membership and Professional Standards Committee. 相似文献
128.
Rectus sheath haematoma is a well‐documented but unusual cause of acute abdomen. Combination of clinical features and appropriate radiological investigations can make for a prompt diagnosis. Most authors advocate conservative management and it has been reported that patients were directly discharged from the emergency department. We report a case of rectus sheath haematoma which progressed with clinical deterioration and necessitated surgical intervention for clot evacuation. Causes, physical signs, radiological features and classification of rectus sheath haematoma are discussed. It may be necessary to continue close clinical monitoring after diagnosis of rectus sheath haematoma. 相似文献
129.
130.
F Y Wong P J Mitchell B M Tress P A Dargaville P M Loughnan 《Journal of perinatology》2006,26(5):273-278
OBJECTIVE: To examine hemodynamic changes following endovascular embolization in newborn infants with vein of Galen malformation and severe cardiac failure in the first week of life. STUDY DESIGN: Over a recent 5-year period, nine such infants were identified. In seven of these infants, changes in arterial blood pressure were analyzed in relation to the timing of embolization procedures. RESULTS: A significant increase in arterial blood pressure was noted after most embolizations. In two infants, this systemic hypertension was severe and treated using intravenous antihypertensive drugs. Both infants subsequently developed complete infarction of both cerebral hemispheres with sparing of the brainstem and cerebellum. Mortality in the nine infants was 33%, and 83% of the survivors were neurologically normal or near normal at follow-up. CONCLUSION: The systemic hypertension observed following endovascular embolizations may provide a protective mechanism to maintain cerebral blood flow after reperfusion injury. Lowering blood pressure in this situation may therefore be detrimental. 相似文献