全文获取类型
收费全文 | 101824篇 |
免费 | 29047篇 |
国内免费 | 1108篇 |
专业分类
耳鼻咽喉 | 2408篇 |
儿科学 | 2695篇 |
妇产科学 | 2466篇 |
基础医学 | 3268篇 |
口腔科学 | 5156篇 |
临床医学 | 26332篇 |
内科学 | 25179篇 |
皮肤病学 | 3380篇 |
神经病学 | 12584篇 |
特种医学 | 3737篇 |
外国民族医学 | 7篇 |
外科学 | 17965篇 |
综合类 | 136篇 |
现状与发展 | 40篇 |
一般理论 | 2篇 |
预防医学 | 13680篇 |
眼科学 | 2139篇 |
药学 | 1451篇 |
中国医学 | 24篇 |
肿瘤学 | 9330篇 |
出版年
2024年 | 748篇 |
2023年 | 5054篇 |
2022年 | 1160篇 |
2021年 | 2818篇 |
2020年 | 5388篇 |
2019年 | 2090篇 |
2018年 | 6938篇 |
2017年 | 7378篇 |
2016年 | 8015篇 |
2015年 | 8096篇 |
2014年 | 10547篇 |
2013年 | 12251篇 |
2012年 | 4028篇 |
2011年 | 3895篇 |
2010年 | 6989篇 |
2009年 | 9261篇 |
2008年 | 3741篇 |
2007年 | 2714篇 |
2006年 | 3859篇 |
2005年 | 2400篇 |
2004年 | 1725篇 |
2003年 | 1333篇 |
2002年 | 1256篇 |
2001年 | 1833篇 |
2000年 | 1154篇 |
1999年 | 1705篇 |
1998年 | 2108篇 |
1997年 | 1946篇 |
1996年 | 1989篇 |
1995年 | 1709篇 |
1994年 | 1106篇 |
1993年 | 928篇 |
1992年 | 757篇 |
1991年 | 633篇 |
1990年 | 507篇 |
1989年 | 512篇 |
1988年 | 503篇 |
1987年 | 371篇 |
1986年 | 352篇 |
1985年 | 292篇 |
1984年 | 250篇 |
1983年 | 303篇 |
1982年 | 224篇 |
1981年 | 195篇 |
1980年 | 121篇 |
1978年 | 119篇 |
1977年 | 116篇 |
1976年 | 84篇 |
1974年 | 71篇 |
1972年 | 72篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
The contribution of structural free space to the solvent power of water was examined by a systematic modification of the geometric factor. Gaps and holes, available to foreign molecule occupation, are thought to be filled at low concentrations (max. 1 %) of aliphatic alcohols. The effect upon solvency reached approximately 10%, which suggests that spatial parameters affect solvent power. The results demonstrate the importance of solvent purity in the dissolution process. 相似文献
992.
Kris Deering DipHe RMN BSc MH Inpatient Care MSc P.G. Ed PhD student. Jo Williams BSc RMN MSc PhD. Kay Stayner BSc RMN. Chris Pawson BSc PGCHE PhD. 《Nursing philosophy》2021,22(1):e12329
As a philosophical position, pragmatism can be critiqued to distinguish truth only with methods that bring about desired results, predominantly with scientific enquiry. The article hopes to dismiss this oversimplification and propose that within mental health nursing, enquiry enlightened by pragmatism can be anchored to methods helping to tackle genuine human problems. Whilst pragmatists suggest one reality exists, fluctuating experiences and shifting beliefs about the world can inhabit within; hence, pragmatists propose reality has the potential to change. Moreover, pragmatism includes being cognisant of what works to whom reality concerns, making reality context-driven, with a view to understand how actions shape experiences so what is generated has usefulness. Hence, it somewhat follows pragmatism can inform mental health nursing, after all, nursing is a discipline of action, and awareness is needed in how actions produce experiences that patients find helpful. Given the principles of recovery are preferably adopted in mental health care, the paper will explore how pragmatism can help nurses move towards that goal; specifically, with patients voicing their experiences. This is because like pragmatism, recovery subscribes to hope that reality can progress, and through meaningful experiences and beliefs, patients have expertise about personal difficulties alongside how life may flourish, despite mental illness. 相似文献
993.
The importance of developing cultural competence among healthcare professionals is well recognized. However, the widespread reports of insensitivity and deficiencies in care for culturally diverse patients illuminate the need to review how cultural competence development is taught, learnt and applied in practice. Unless we can alter the ‘hearts and minds’ of practising nurses to provide the care that they know they should, culturally insensitive care will continue operating in subtle ways. This paper explores the ideas behind nurses’ actions and omissions when caring for culturally diverse patients and proposes the need to examine cultural competence development through a moral reasoning lens. Examining cultural competence development through a moral reasoning lens can help empower nurses, whilst nurturing commitment and courage to providing quality care that meets the needs of culturally diverse patients. The model of morality provides a framework that explores how moral motivation and behaviour occur and can provide a vehicle for critically examining the knowledge, skills and attitudes required to provide culturally responsive care. 相似文献
994.
995.
996.
Philip Eisermann Dennis Rubbenstroth Daniel Cadar Corinna Thom-Bolduan Petra Eggert Alexander Schlaphof Frank Leypoldt Martin Stangel Thorsten Fortwngler Florian Hoffmann Andreas Osterman Sabine Zange Hans-Helmut Niller Klemens Angstwurm Kirsten Prtner Christina Frank Hendrik Wilking Martin Beer Jonas Schmidt-Chanasit Dennis Tappe 《Emerging infectious diseases》2021,27(5):1371
Human bornavirus encephalitis is a severe and often fatal infection caused by variegated squirrel bornavirus 1 (VSBV-1) and Borna disease virus 1 (BoDV-1). We conducted a prospective study of bornavirus etiology of encephalitis cases in Germany during 2018–2020 by using a serologic testing scheme applied along proposed graded case definitions for VSBV-1, BoDV-1, and unspecified bornavirus encephalitis. Of 103 encephalitis cases of unknown etiology, 4 bornavirus infections were detected serologically. One chronic case was caused by VSBV-1 after occupational-related contact of a person with exotic squirrels, and 3 acute cases were caused by BoDV-1 in virus-endemic areas. All 4 case-patients died. Bornavirus etiology could be confirmed by molecular methods. Serologic testing for these cases was virus specific, discriminatory, and a practical diagnostic option for living patients if no brain tissue samples are available. This testing should be guided by clinical and epidemiologic suspicions, such as residence in virus-endemic areas and animal exposure. 相似文献
997.
Hamari Lotta Konttila Jenni Merikukka Marko Tuomikoski Anna-Maria Kouvonen Petra Kurki Marjo 《Journal of immigrant and minority health / Center for Minority Public Health》2022,24(2):506-525
Journal of Immigrant and Minority Health - Parental support is of paramount importance in the promotion of positive parenting, strengthening parenthood and protecting children from disadvantages... 相似文献
998.
Arturo Blazquez-Navarro Chantip Dang-Heine Patrizia Wehler Toralf Roch Chris Bauer Sindy Neumann Rodrigo Blazquez-Navarro Andriy Kurchenko Kerstin Wolk Robert Sabat Timm H. Westhoff Sven Olek Oliver Thomusch Harald Seitz Petra Reinke Christian Hugo Birgit Sawitzki Michal Or-Guil Nina Babel 《Transplant international》2021,34(9):1680-1688
Epstein–Barr virus (EBV) reactivation is a very common and potentially lethal complication of renal transplantation. However, its risk factors and effects on transplant outcome are not well known. Here, we have analysed a large, multi-centre cohort (N = 512) in which 18.4% of the patients experienced EBV reactivation during the first post-transplant year. The patients were characterized pre-transplant and two weeks post-transplant by a multi-level biomarker panel. EBV reactivation was episodic for most patients, only 12 patients showed prolonged viraemia for over four months. Pre-transplant EBV shedding and male sex were associated with significantly increased incidence of post-transplant EBV reactivation. Importantly, we also identified a significant association of post-transplant EBV with acute rejection and with decreased haemoglobin levels. No further severe complications associated with EBV, either episodic or chronic, could be detected. Our data suggest that despite relatively frequent EBV reactivation, it had no association with serious complications during the first post-transplantation year. EBV shedding prior to transplantation could be employed as biomarkers for personalized immunosuppressive therapy. In summary, our results support the employed immunosuppressive regimes as relatively safe with regard to EBV. However, long-term studies are paramount to support these conclusions. 相似文献
999.
Nicole E. Sharp MD FACS Darren B. Sachs DO Nicole M. Melchior DO Philip Albaneze MD FACS Salvatore Nardello DO Elin R. Sigurdson MD PhD FACS Mengying Deng MMath Allison A. Aggon DO FACOS John M. Daly MD FACS Richard J. Bleicher MD FACS 《The breast journal》2021,27(4):335-344
Prospective trials demonstrate that sentinel node (SN) biopsy after neo-adjuvant chemotherapy (NACT) has a significant false-negative rate (FNR) when only 1 or 2 SNs are removed. It is unknown whether this increased FNR correlates with an elevated risk of recurrence. Tumor Registry data at an NCI-Designated Comprehensive Cancer Center were reviewed from 2004 to 2018 for patients having a negative SN biopsy after NACT. Among 190 patients with histologically negative nodes after NACT having 1 (n = 42), 2 (n = 46), and ≥3 (n = 102) SNs, axillary recurrences occurred in 7.14%, 0%, and 1.96% (p = 0.09), breast recurrences occurred in 2.38%, 6.52%, and 0.98% (p = 0.12), and distance recurrences occurred in 16.67%, 8.70%, and 7.84% (p = 0.27), respectively. Time to first recurrence did not differ by SN count (p = 0.41). After adjustment for age, race, clinical stage, and receptor status, there were no differences in the rates of axillary (p = 0.26), breast (p = 0.44), or distance recurrence (p = 0.24) by numbers of SNs harvested. Median follow-up was 46.8 months. Despite higher post-NACT FNRs reported in randomized trials for patients having <3 sentinel nodes, recurrence rates were not significantly different for 1 versus 2 versus ≥3 SNs. This suggests that patients having 1 or 2 post-NACT SNs identified may not necessitate axillary dissection. 相似文献
1000.