全文获取类型
收费全文 | 39240篇 |
免费 | 3272篇 |
国内免费 | 94篇 |
专业分类
耳鼻咽喉 | 307篇 |
儿科学 | 1158篇 |
妇产科学 | 938篇 |
基础医学 | 5668篇 |
口腔科学 | 732篇 |
临床医学 | 4086篇 |
内科学 | 7838篇 |
皮肤病学 | 483篇 |
神经病学 | 3527篇 |
特种医学 | 1037篇 |
外国民族医学 | 3篇 |
外科学 | 5268篇 |
综合类 | 836篇 |
一般理论 | 59篇 |
预防医学 | 3774篇 |
眼科学 | 987篇 |
药学 | 3161篇 |
中国医学 | 61篇 |
肿瘤学 | 2683篇 |
出版年
2023年 | 227篇 |
2022年 | 331篇 |
2021年 | 802篇 |
2020年 | 467篇 |
2019年 | 780篇 |
2018年 | 859篇 |
2017年 | 624篇 |
2016年 | 768篇 |
2015年 | 881篇 |
2014年 | 1217篇 |
2013年 | 1779篇 |
2012年 | 2577篇 |
2011年 | 2639篇 |
2010年 | 1508篇 |
2009年 | 1363篇 |
2008年 | 2258篇 |
2007年 | 2394篇 |
2006年 | 2413篇 |
2005年 | 2374篇 |
2004年 | 2306篇 |
2003年 | 2015篇 |
2002年 | 1908篇 |
2001年 | 626篇 |
2000年 | 582篇 |
1999年 | 600篇 |
1998年 | 472篇 |
1997年 | 413篇 |
1996年 | 363篇 |
1995年 | 343篇 |
1994年 | 309篇 |
1993年 | 305篇 |
1992年 | 437篇 |
1991年 | 398篇 |
1990年 | 361篇 |
1989年 | 347篇 |
1988年 | 341篇 |
1987年 | 328篇 |
1986年 | 315篇 |
1985年 | 283篇 |
1984年 | 251篇 |
1983年 | 258篇 |
1982年 | 220篇 |
1981年 | 201篇 |
1980年 | 176篇 |
1979年 | 220篇 |
1978年 | 183篇 |
1977年 | 168篇 |
1976年 | 138篇 |
1974年 | 158篇 |
1973年 | 135篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
Distal radial fractures Injectable calcium phosphate bone cement versus conventional treatment 总被引:2,自引:0,他引:2
AMEDLINEsearchwasconductedtoidentifystudiespublishedfromJanuary1999toMarch2004thatcom-paredinjectablecalciumphosphatebone(NorianSRS)cementwithconventionaltreatmentindistalradialfrac-tures.Fromalistof13articlesidentifiedfromthesearchstrategy,fourarticleswe… 相似文献
92.
Jamieson M Bourque Eric J Velazquez Robert H Tuttle Linda K Shaw Christopher M O'Connor Salvador Borges-Neto 《Journal of nuclear cardiology》2007,14(2):165-173
BACKGROUND: Left ventricular ejection fraction (LVEF) is a significant predictor of morbidity and death. The nuclear summed rest score (SRS) measures myocardial perfusion defects and provides prognostic information, but its effects on long-term outcomes are not fully established. Moreover, information regarding the potential interaction between these 2 covariates is limited. The purpose of this study was to determine whether the mortality risk associated with LVEF is the same across all values of SRS in a population undergoing evaluation for ischemic heart disease. METHODS AND RESULTS: We examined 3,187 patients who underwent cardiac catheterization and perfusion single photon emission computed tomography imaging with a maximum follow-up of 8.1 years and median follow-up of 3.1 years. Cox proportional hazards modeling showed that increasing nuclear SRS and decreasing LVEF were independently associated with a higher long-term mortality rate, with a clinically significant interaction between them (P = .032). Patients with a normal LVEF and a high SRS (greater perfusion abnormality) have a prognosis similar to those with a reduced LVEF. CONCLUSIONS: Resting perfusion studies provide prognostic information for long-term survival and significantly impact the interpretation of mortality risk associated with changes in LVEF. Patient prognostication, risk stratification, and future research using these variables should take this interaction into account. 相似文献
93.
94.
95.
Human rhinoviruses: the cold wars resume. 总被引:1,自引:0,他引:1
Ian M Mackay 《Journal of clinical virology》2008,42(4):297-320
96.
97.
R M Thomas A Aldibbiat W Griffin M A A Cox N J Leech J A M Shaw 《Diabetic medicine》2007,24(7):778-783
AIM: To determine potential for amelioration of recurrent severe hypoglycaemia without worsening in overall control in individuals with long-standing Type 1 diabetes (T1DM). METHODS: Twenty-one people with T1DM characterized by altered hypoglycaemia awareness and debilitating severe hypoglycaemia were randomized in a pilot 24-week prospective study to optimized analogue therapy (ANALOGUE; lispro/glargine); continuous subcutaneous insulin infusion therapy (CSII; lispro); or re-education with relaxation of blood glucose targets on existing conventional insulin regimen (EDUCATION). Glycaemic profiles and duration of biochemical hypoglycaemia were measured by continuous subcutaneous glucose monitoring and self-monitored blood glucose. RESULTS: Further severe hypoglycaemia was prevented in five participants (71%) in each group (P = 0.06). Incidence of severe hypoglycaemia was: 0.6 (ANALOGUE), 0.9 (CSII), and 3.7 (EDUCATION) episodes per patient year. Restoration of hypoglycaemia awareness was confirmed by validated questionnaire in three (43%) ANALOGUE, four (57%) CSII and five (71%) EDUCATION patients. Glycated haemoglobin (HbA1c) was significantly improved in the ANALOGUE group between weeks 0 and 24 (8.6 +/- 1.1 vs. 7.6 +/- 0.8%; P = 0.04 for change). Non-significant improvement was seen in the CSII group (8.5 +/- 1.9 vs. 7.4 +/- 1.0%; P = 0.06). No change in HbA1c was seen in the EDUCATION group (8.5 +/- 1.1 vs. 8.3 +/- 1.0%; P = 0.54). There were no episodes of diabetic ketoacidosis or any other adverse events in any group. CONCLUSIONS: In this pilot randomized trial comparing optimized ANALOGUE, CSII or EDUCATION alone in unselected individuals with recurrent severe hypoglycaemia, we show potential for restoring hypoglycaemia awareness and preventing further severe hypoglycaemia with concomitant improvement in glycaemic control in ANALOGUE and CSII groups. 相似文献
98.
99.
100.