全文获取类型
收费全文 | 546篇 |
免费 | 28篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 7篇 |
妇产科学 | 3篇 |
基础医学 | 37篇 |
口腔科学 | 3篇 |
临床医学 | 34篇 |
内科学 | 145篇 |
皮肤病学 | 11篇 |
神经病学 | 75篇 |
特种医学 | 2篇 |
外科学 | 104篇 |
综合类 | 7篇 |
一般理论 | 4篇 |
预防医学 | 65篇 |
眼科学 | 24篇 |
药学 | 40篇 |
肿瘤学 | 11篇 |
出版年
2023年 | 3篇 |
2021年 | 2篇 |
2020年 | 2篇 |
2019年 | 6篇 |
2018年 | 9篇 |
2017年 | 13篇 |
2016年 | 8篇 |
2015年 | 9篇 |
2014年 | 13篇 |
2013年 | 14篇 |
2012年 | 21篇 |
2011年 | 31篇 |
2010年 | 16篇 |
2009年 | 16篇 |
2008年 | 26篇 |
2007年 | 53篇 |
2006年 | 47篇 |
2005年 | 38篇 |
2004年 | 49篇 |
2003年 | 34篇 |
2002年 | 29篇 |
2001年 | 9篇 |
2000年 | 23篇 |
1999年 | 17篇 |
1998年 | 10篇 |
1997年 | 5篇 |
1996年 | 4篇 |
1995年 | 7篇 |
1994年 | 5篇 |
1992年 | 9篇 |
1991年 | 7篇 |
1990年 | 4篇 |
1989年 | 5篇 |
1988年 | 4篇 |
1987年 | 7篇 |
1986年 | 3篇 |
1985年 | 1篇 |
1984年 | 6篇 |
1983年 | 4篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1968年 | 1篇 |
1962年 | 2篇 |
排序方式: 共有574条查询结果,搜索用时 16 毫秒
1.
Miesje M. Nijs Clothilde J. E. Bun Wanda M. Tempelaar Niek J. de Wit Huibert Burger Carolien M. Plevier Marco P. M. Boks 《Community mental health journal》2014,50(2):127-134
School environment is an important determinant of psychosocial function and may also be related to mental health. We therefore investigated whether perceived school safety, a simple measure of this environment, is related to mental health problems. In a population-based sample of 11,130 secondary school students, we analysed the relationship of perceived school safety with mental health problems using multiple logistic regression analyses to adjust for potential confounders. Mental health problems were defined using the clinical cut-off of the self-reported Strengths and Difficulties Questionnaire. School safety showed an exposure–response relationship with mental health problems after adjustment for confounders. Odds ratios increased from 2.48 (“sometimes unsafe”) to 8.05 (“very often unsafe”). The association was strongest in girls and young and middle-aged adolescents. Irrespective of the causal background of this association, school safety deserves attention either as a risk factor or as an indicator of mental health problems. 相似文献
2.
Ramon R. Gorter Johanna H. van der Lee Florence A.C.J. Heijsters Huibert A. Cense Roel Bakx C.M. Frank Kneepkens Marc H. Wijnen Alida F.W. van der Steeg Klaas H. int Hof Martin Offringa Hugo A. Heij 《Journal of pediatric surgery》2018,53(9):1849-1854
Purpose
To compare the outcome of initially nonoperative treatment with immediate appendectomy for simple appendicitis in children.Methods
Between September 2012 and June 2014 children aged 7–17 years with a radiologically confirmed simple appendicitis were invited to participate in a multicentre prospective cohort study in which they were treated with an initially nonoperative treatment strategy; nonparticipants underwent immediate appendectomy. In October 2015, their rates of complications and subsequent appendectomies, and health-related quality of life (HRQOL) were assessed.Results
In this period, 25 children were treated with an initially nonoperative treatment strategy and 19 with immediate appendectomy; median (range) follow-up was 25 (16–36) and 26 (17–34) months, respectively. The percentage [95%CI] of patients experiencing complications in the initially nonoperative group and the immediate appendectomy group was 12 [4–30]% and 11 [3–31]%, respectively. In total 6/25 children (24%) underwent an appendectomy; none of the 6 patients operated subsequently experienced any postappendectomy complications. Overall, HRQOL in the nonoperative treatment group was similar to that of healthy peers.Conclusions
Outcome of initially nonoperative treatment for acute simple appendicitis in children is similar to the outcome in those who undergo immediate appendectomy. Initially nonoperative management seems to be able to avoid appendectomy in 3 out of 4 children.Level of evidence
2 (prospective comparative study). This research did not receive any specific grant from funding agencies in the public, commercial or not-for-profit sectors. 相似文献3.
4.
Ethical implications of home telecare for older people: a framework derived from a multisited participative study 下载免费PDF全文
Maggie Mort PhD Celia Roberts PhD Jeannette Pols PhD Miquel Domenech PhD Ingunn Moser PhD The EFORTT investigators 《Health expectations》2015,18(3):438-449
Context
Telecare and telehealth developments have recently attracted much attention in research and service development contexts, where their evaluation has predominantly concerned effectiveness and efficiency. Their social and ethical implications, in contrast, have received little scrutiny.Objective
To develop an ethical framework for telecare systems based on analysis of observations of telecare‐in‐use and citizens’ panel deliberations.Design
Ethnographic study (observation, work shadowing), interviews, older citizens’ panels and a participative conference.Setting
Participants’ homes, workplaces and familiar community venues in England, Spain, the Netherlands and Norway 2008–2011.Results
Older respondents expressed concerns that telecare might be used to replace face‐to‐face/hands‐on care to cut costs. Citizens’ panels strongly advocated ethical and social questions being considered in tandem with technical and policy developments. Older people are too often excluded from telecare system design, and installation is often wrongly seen as a one‐off event. Some systems enhance self‐care by increasing self‐awareness, while others shift agency away from the older person, introducing new forms of dependency.Conclusions
Telecare has care limitations; it is not a solution, but a shift in networks of relations and responsibilities. Telecare cannot be meaningfully evaluated as an entity, but rather in the situated relations people and technologies create together. Characteristics of ethical telecare include on‐going user/carer engagement in decision making about systems: in‐home system evolution with feedback opportunities built into implementation. System design should be horizontal, ‘two‐way’/interactive rather than vertical or ‘one‐way’. An ethical framework for telecare has been developed from these conclusions (Table 1). 相似文献5.
de Ronde W van der Schouw YT Pols HA Gooren LJ Muller M Grobbee DE de Jong FH 《Clinical chemistry》2006,52(9):1777-1784
BACKGROUND: Estimation of serum concentrations of free testosterone (FT) and bioavailable testosterone (bioT) by calculation is an inexpensive and uncomplicated method. We compared results obtained with 5 different algorithms. METHODS: We used 5 different published algorithms [described by Sodergard et al. (bioTS and FTS), Vermeulen et al. (bioTV and FTV), Emadi-Konjin et al. (bioTE), Morris et al. (bioTM), and Ly et al. (FTL)] to estimate bioT and FT concentrations in samples obtained from 399 independently living men (ages 40-80 years) participating in a cross-sectional, single-center study. RESULTS: Mean bioT was highest for bioTS (10.4 nmol/L) and lowest for bioT(E) (3.87 nmol/L). Mean FT was highest for FTS (0.41 nmol/L), followed by FTV (0.35 nmol/L), and FTL (0.29 nmol/L). For bioT concentrations, the Pearson correlation coefficient was highest for the association between bioTS and bioTV (r = 0.98) and lowest between bioTM and bioTE (r = 0.66). FTL was significantly associated with both FTS (r = 0.96) and FTV (r = 0.88). The Pearson correlation coefficient for the association between FTL and bioTM almost reached 1.0. Bland-Altman analysis showed large differences between the results of different algorithms. BioTM, bioTE, bioTV, and FTL were all significantly associated with sex hormone binding globulin (SHBG) concentrations. CONCLUSION: Algorithms to calculate FT and bioT must be revalidated in the local setting, otherwise over- or underestimation of FT and bioT concentrations can occur. Additionally, confounding of the results by SHBG concentrations may be introduced. 相似文献
6.
Seizures and disturbed brain potassium dynamics in the leukodystrophy megalencephalic leukoencephalopathy with subcortical cysts 下载免费PDF全文
7.
Jeannette Pols 《Medicine, health care, and philosophy》2013,16(4):953-966
There are roughly two meanings attached to the concept of dignity: humanitas and dignitas. Humanitas refers to ethical and juridical notions of equality, autonomy and freedom. Much less understood is the meaning of dignitas, which this paper develops as peoples’ engagement with aesthetic values and genres, and hence with differences between people. Departing from a critical reading of Georgio Agamben’s notion of ‘bare life’, I will analyze a case where aesthetics are quite literally at stake: women who lost their hair due to cancer treatment. The analysis shows a complicated interplay between varying evaluations of female baldness by the self and others, mediated by (often strongly negative) cultural imaginaries, and aesthetic genres depicting conventional ways of ‘looking good’. The paper concludes by arguing for a reconnection of the two notions of dignity, and for a rehabilitation of aesthetics in daily life and care as fundamental values for organizing our societies. 相似文献
8.
9.
No abstract available. 相似文献
10.
This paper reports a clinical evaluation of Bentley's new Univox membrane oxygenator (Bentley Laboratories, Irvine, California). In this new device, the blood flow path is outside the fibre, the incorporated heat exchanger consists of a 22-channel stainless-steel bellows, and the polypropylene fibres are woven into fibre ribbons and wound into each of the bellows channels. In this way, heat and gas transfers take place simultaneously. The priming volume has been reduced to 220ml and the membrane has an effective surface area of 1.6m 2. A BMR 1900 collapsible reservoir (Bentley Laboratories, Irvine, California) was used as a venous reservoir. Ten consenting patients undergoing elective coronary artery bypass surgery were perfused with this new oxygenator. BSA was between 1.7 and 2.11m 2; mean BSA was 1.81. Minimum priming was 1200 ml. The blood-gas results were all within or close to the normal range used in our institution. Acid-base management was performed using alpha-stat regulation and no problems occurred in this series of patients. Average pO 2 was 155mmHG+/-53 with a mean O 2 transfer of 90.7ml and a maximum of 185ml. The heat exchange performance was very good, with a mean coefficient of heat exchange of 0.54+/-0.11 and a maximum of 0.87. 相似文献