全文获取类型
收费全文 | 31143篇 |
免费 | 2109篇 |
国内免费 | 83篇 |
专业分类
耳鼻咽喉 | 279篇 |
儿科学 | 757篇 |
妇产科学 | 569篇 |
基础医学 | 4463篇 |
口腔科学 | 729篇 |
临床医学 | 2902篇 |
内科学 | 6014篇 |
皮肤病学 | 537篇 |
神经病学 | 3463篇 |
特种医学 | 1206篇 |
外国民族医学 | 55篇 |
外科学 | 4169篇 |
综合类 | 369篇 |
一般理论 | 11篇 |
预防医学 | 2550篇 |
眼科学 | 876篇 |
药学 | 2185篇 |
中国医学 | 37篇 |
肿瘤学 | 2164篇 |
出版年
2023年 | 122篇 |
2022年 | 111篇 |
2021年 | 442篇 |
2020年 | 325篇 |
2019年 | 500篇 |
2018年 | 559篇 |
2017年 | 475篇 |
2016年 | 512篇 |
2015年 | 671篇 |
2014年 | 855篇 |
2013年 | 1259篇 |
2012年 | 1922篇 |
2011年 | 1988篇 |
2010年 | 1071篇 |
2009年 | 993篇 |
2008年 | 1797篇 |
2007年 | 1949篇 |
2006年 | 1804篇 |
2005年 | 1845篇 |
2004年 | 1788篇 |
2003年 | 1646篇 |
2002年 | 1608篇 |
2001年 | 407篇 |
2000年 | 345篇 |
1999年 | 348篇 |
1998年 | 281篇 |
1997年 | 271篇 |
1996年 | 233篇 |
1995年 | 252篇 |
1994年 | 218篇 |
1993年 | 224篇 |
1992年 | 228篇 |
1991年 | 214篇 |
1990年 | 187篇 |
1989年 | 194篇 |
1988年 | 193篇 |
1987年 | 200篇 |
1986年 | 174篇 |
1985年 | 178篇 |
1984年 | 226篇 |
1983年 | 191篇 |
1982年 | 232篇 |
1981年 | 208篇 |
1980年 | 188篇 |
1979年 | 165篇 |
1978年 | 152篇 |
1976年 | 141篇 |
1975年 | 126篇 |
1974年 | 150篇 |
1973年 | 113篇 |
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
1.
Die Anaesthesiologie - Die Intensive Care Unit-Acquired Weakness (ICUAW) stellt eine der häufigsten neuromuskulären Komplikationen in der Intensivmedizin dar. Besonders bei... 相似文献
2.
Roman Kia Rahimi-Nedjat Andrea Tuettenberg Keyvan Sagheb Carmen Loquai Benedict Rybczynski Stephan Grabbe Christian Walter Bilal Al-Nawas 《Journal of cranio-maxillo-facial surgery》2021,49(4):317-322
To investigate factors that affect and also decrease the duration for recurrences and secondary tumors in cSCC.A retrospective study was conducted for all patients who were treated for a cSCC of the head and neck between 2009 and 2016. Anamnestic as well as epidemiological and histological data were noted and correlated with the occurrence of recurrences and secondary cancers. The duration between surgery and these events was used to determine if histological factors accelerate their occurrence.The highest risk for recurrences was seen in patients with previous skin cancers (RR 3.23). Histological ulceration (p = 0.003) and grading (p = 0.031) of the tumor were found as significant factors accelerating the time to relapse. Surrounding chronic precancerotic lesions (p < 0.001) and poor tumor grading (p = 0.035) were found as significant factors accelerating the time until a secondary cSCC was observed.Known risk factors increase not only the risk for a cSCC but also for recurrences. Specific histologic findings can help to adjust follow-up intervals to identify recurrences and secondary tumors at an early stage as these were shown to decrease the duration for a further event. 相似文献
3.
Ferrando Vicente Montagud-Martínez Diego Martínez-Espert Anabel Furlan Walter D. 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2022,260(12):4021-4022
Graefe's Archive for Clinical and Experimental Ophthalmology - 相似文献
4.
5.
Pädiatrie & Pädologie - Im deutschen Sprachraum leben etwa 80.000 Kinder mit Zerebralparesen mit Bedarf für eine dauerhafte, hochspezialisierte... 相似文献
6.
7.
Eric D. Hansen Mary M. Mitchell Dulce M. Cruz Oliver Fahid A. Alghanim Michelle Walter Amy A. Case Tom Smith Amy R. Knowlton 《Journal of pain and symptom management》2019,57(5):961-965
Context
In the era of effective antiretroviral therapy, persons living with HIV/AIDS (PLWHA) are living longer, transforming HIV from a universally fatal disease to a serious chronic illness, warranting discussions between patients and their loved ones about advance care planning (ACP). Evidence is needed on factors associated with patients' likelihood to discuss ACP with loved ones.Objectives
To further characterize factors associated with successful ACP in PLWHAs with their loved ones, we examined associations between patients having ACP discussions with the need for assistance with personal care, chronic pain, life satisfaction, prior family disagreements over health care decisions, sex, age, and interference in daily routines due to memory problems.Methods
Data were from the Affirm Care study (N = 370), which examined social and environmental factors associated with health outcomes among PLWHAs and their informal caregivers.Results
Slightly more than half of respondents discussed ACP with loved ones (57%). In adjusted analysis, higher levels of chronic pain (odds ratio [OR] = 2.09, P = 0.045), needing assistance with personal care (OR = 1.63, P = 0.023), greater life satisfaction (OR = 1.02, P = 0.002), prior family arguments over health care decisions (OR = 2.80, P < 0.001), and female sex (OR = 2.22, P = 0.001) were associated with higher odds of discussing ACP with loved ones, whereas age, drug use, education level, depression, and memory problems were nonsignificant.Conclusion
These results suggest that interventions to increase ACP among PLWHAs and their loved ones should target males. The findings also suggest PLWHAs with chronic pain, the need for assistance with personal care, and those with a history of prior family arguments over health care decisions may be primed for ACP. 相似文献8.
9.
Paula M. Frew Raphiel Murden C. Christina Mehta Allison T. Chamberlain Alan R. Hinman Glen Nowak Judith Mendel Ann Aikin Laura A. Randall Allison L. Hargreaves Saad B. Omer Walter A. Orenstein Robert A. Bednarczyk 《Vaccine》2019,37(2):325-332
Objective
To develop a Vaccine Confidence Index (VCI) that is capable of detecting variations in parental confidence towards childhood immunizations centered on trust and concern issues that impact vaccine confidence.Methods
We used a web-based national poll of 893 parents of children <7?years in 2016 to assess the measures created for the Emory VCI (EVCI). EVCI measures were developed using constructs related to vaccine confidence identified by the U.S. National Vaccine Advisory Committee (i.e., “Information Environment”, “Trust”, “Healthcare Provider”, “Attitudes and Beliefs”, and “Social Norms”). Reliability for EVCI was assessed using Cronbach’s alpha. Using the variables related to each of the constructs, we calculated an overall EVCI score that was then assessed against self-reported childhood vaccine receipt using chi-square and the Cochrane-Armitage trend tests.Results
Respondents’ EVCI scores could range from 0 to 24, and the full range of values was observed in this sample (Mean?=?17.5 (SD 4.8)). EVCI scores were significantly different (p?≤?0.006 for all comparisons) between parents who indicated their child(ren) received routinely recommended vaccines compared with parents who indicated they had delayed or declined recommended immunizations. There was also a significant, consistent association between higher EVCI scores and greater reported vaccine receipt.Conclusions
We developed EVCI to reliably measure parental vaccine confidence, with individuals’ scores linked to parental vaccine-related attitudes, intentions, and behaviors. As such, EVCI may be a useful tool for future monitoring of both population and individual confidence in childhood immunization. 相似文献10.
Journal of Neuro-Oncology - Telomere length-associated SNPs have been associated with incidence and survival rates for malignant brain tumors such as glioma. Here, we study the influence of... 相似文献