全文获取类型
收费全文 | 5484篇 |
免费 | 463篇 |
国内免费 | 79篇 |
专业分类
耳鼻咽喉 | 48篇 |
儿科学 | 101篇 |
妇产科学 | 73篇 |
基础医学 | 854篇 |
口腔科学 | 80篇 |
临床医学 | 601篇 |
内科学 | 1119篇 |
皮肤病学 | 59篇 |
神经病学 | 317篇 |
特种医学 | 194篇 |
外科学 | 1050篇 |
综合类 | 275篇 |
现状与发展 | 1篇 |
一般理论 | 4篇 |
预防医学 | 367篇 |
眼科学 | 217篇 |
药学 | 301篇 |
中国医学 | 59篇 |
肿瘤学 | 306篇 |
出版年
2023年 | 32篇 |
2022年 | 54篇 |
2021年 | 133篇 |
2020年 | 86篇 |
2019年 | 84篇 |
2018年 | 107篇 |
2017年 | 84篇 |
2016年 | 91篇 |
2015年 | 87篇 |
2014年 | 131篇 |
2013年 | 197篇 |
2012年 | 240篇 |
2011年 | 249篇 |
2010年 | 154篇 |
2009年 | 133篇 |
2008年 | 226篇 |
2007年 | 223篇 |
2006年 | 265篇 |
2005年 | 219篇 |
2004年 | 270篇 |
2003年 | 274篇 |
2002年 | 248篇 |
2001年 | 229篇 |
2000年 | 182篇 |
1999年 | 150篇 |
1998年 | 76篇 |
1997年 | 64篇 |
1996年 | 56篇 |
1995年 | 52篇 |
1994年 | 60篇 |
1993年 | 49篇 |
1992年 | 141篇 |
1991年 | 118篇 |
1990年 | 120篇 |
1989年 | 115篇 |
1988年 | 84篇 |
1987年 | 87篇 |
1986年 | 70篇 |
1985年 | 65篇 |
1984年 | 75篇 |
1983年 | 55篇 |
1982年 | 42篇 |
1981年 | 32篇 |
1980年 | 33篇 |
1979年 | 36篇 |
1977年 | 45篇 |
1976年 | 30篇 |
1974年 | 30篇 |
1973年 | 55篇 |
1972年 | 37篇 |
排序方式: 共有6026条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
血管内皮生长因子及炎性因子在油酸性犬急性呼吸窘迫综合征中的变化 总被引:1,自引:0,他引:1
目的探讨油酸性急性呼吸窘迫综合征(ARDS)beagle犬血浆及肺泡灌洗液血管内皮生长因子(VEGF)、可溶性细胞间黏附分子-1(ICAM-1)、白细胞介素-8(IL-8)、肿瘤坏死因子-α(TNF—α)水平的改变。方法12只英国纯种beagle犬,静脉注射油酸0.15mL/kg,在注射油酸前、后1h,出现ARDS的典型表现时,抽血测VEGF、sICAM-1、IL-8、TNF—α,并对此时相作肺泡灌洗液VEGF、sICAM—1、IL-8、TNF-α的测定。结果beagle犬静脉注射油酸后1h血浆TNF—α升高(P〈0.05),血浆反肺泡灌洗液IL8、sICAM-1和VEGF在1h较油酸前没有明显变化(P〉0.05),beagle犬油酸型ARDS模型建立后血浆及肺泡灌洗液VECF、sICAM-1、IL-8、TNF—α均显著高于建模前(P〈0.05)。结论VEGF、sICAM-1、IL-8、TNF~α在beagle犬油酸型ARDS发生发展过程中可能均起重要作用,其水平的高低可能与ARDS严重程度及预后有关。 相似文献
5.
Thomas Donohue Morton J. Kern Richard Bach Frank Aguirre Thomas Wolford 《Catheterization and cardiovascular interventions》1993,28(2):155-161
The vasomotor response of native human collateral vessels to pharmacologic or hemodynamic vasodilatory stimuli is not well known. We describe a case where retrograde collateral flow velocity was measured both at baseline and following selected hemodynamic and pharmacologic interventions. This index case represents the first in a series of potential human physiologic studies designed to address questions pertaining to control of collateral blood supply in humans. © 1993 Wiley-Liss, Inc. 相似文献
6.
7.
8.
Mohammed E Abushaiqa Frank K Zaran David S Bach Richard T Smolarek Margo S Farber 《American journal of health-system pharmacy》2007,64(11):1170-1173
PURPOSE: Educational interventions to reduce the use of abbreviations and dosage designations that were deemed unsafe at a level 1 trauma center are described. SUMMARY: Strategies to reduce the use of unsafe abbreviations at Detroit Receiving Hospital were studied. Six abbreviations and dosage designations were deemed as unsafe by the site's medication-use and patient medical safety committees: (1) U for units, (2) microg for microgram, (3) TIW for three times a week, (4) the degree symbol for hour, (5) trailing zeros after a decimal point, and (6) the lack of leading zeros before a decimal point. Data on abbreviation use was collected starting in September 2003 by examining copies of patients' order sheets, which are sent from nursing units to the pharmacy for processing. Data were collected during three 24-hour periods each month, with 7-10 days between each period. A data collection sheet was developed to assist in documenting the number of opportunities for each unsafe abbreviation and the actual incidence of each. Educational strategies were developed and implemented starting in October 2003 to decrease the use of the unsafe abbreviations. These strategies included inservice education programs for the medical, pharmacy, and nursing staffs; laminated pocket cards; patient chart dividers; stickers; and interventions by pharmacists and nurses during medication prescribing. During the eight-month evaluation period, 20,160 orders were reviewed, representing 27,663 opportunities to use a designated unsafe abbreviation. Educational interventions successfully reduced the overall incidence of unsafe abbreviations from 19.69% to 3.31%. CONCLUSION: Educational interventions markedly reduced the use of unsafe abbreviations in medication orders over an eight-month evaluation period. 相似文献
9.
Painful polyneuropathy is a common neuropathic pain condition. The present study describes health-related quality of life (HRQL) in a sample of patients with painful polyneuropathy of different origin and the possible predictive role of HRQL for analgesic effect. Ninety-three patients with a diagnosis of painful polyneuropathy were included in the analysis. Data were obtained from three randomised, placebo-controlled cross-over studies testing the effect of different drugs on polyneuropathic pain (St. John's wort, venlafaxine/imipramine and valproic acid). Patients completed a HRQL questionnaire (SF-36) after a drug-free baseline period and at the end of each treatment period. At baseline, all eight SF-36 scores were lower than in the normal population. No significant differences were found between SF-36 scales during placebo and treatment with valproic acid and St. John's wort. Those two drugs had not shown a pain relieving effect in former analysis. The SF-36 scale of bodily pain (BP) was improved by venlafaxine treatment (p=0.023). General health (GH) and vitality (VT) were improved under treatment with imipramine (GH: p=0.006, VT: p=0.015). In a multivariate logistic regression analysis, baseline SF-36 scores predicted subsequent response to pharmacological treatment. Results show an impaired HRQL in painful polyneuropathy and suggest that HRQL may predict response to analgesic treatment. 相似文献
10.