首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1080篇
  免费   70篇
  国内免费   3篇
耳鼻咽喉   4篇
儿科学   41篇
妇产科学   30篇
基础医学   140篇
口腔科学   69篇
临床医学   128篇
内科学   171篇
皮肤病学   8篇
神经病学   162篇
特种医学   25篇
外科学   94篇
综合类   3篇
一般理论   2篇
预防医学   129篇
眼科学   6篇
药学   51篇
肿瘤学   90篇
  2024年   1篇
  2023年   7篇
  2022年   16篇
  2021年   20篇
  2020年   15篇
  2019年   27篇
  2018年   20篇
  2017年   20篇
  2016年   27篇
  2015年   27篇
  2014年   36篇
  2013年   66篇
  2012年   81篇
  2011年   63篇
  2010年   35篇
  2009年   35篇
  2008年   82篇
  2007年   66篇
  2006年   94篇
  2005年   63篇
  2004年   55篇
  2003年   51篇
  2002年   56篇
  2001年   37篇
  2000年   28篇
  1999年   27篇
  1998年   10篇
  1997年   11篇
  1996年   13篇
  1995年   11篇
  1994年   4篇
  1993年   5篇
  1992年   4篇
  1991年   6篇
  1990年   3篇
  1989年   2篇
  1988年   3篇
  1987年   5篇
  1986年   4篇
  1985年   1篇
  1984年   1篇
  1983年   3篇
  1982年   1篇
  1981年   1篇
  1980年   1篇
  1979年   1篇
  1978年   4篇
  1977年   1篇
  1976年   1篇
  1973年   2篇
排序方式: 共有1153条查询结果,搜索用时 11 毫秒
991.
992.
993.
Current research to describe and evaluate effectiveness of voice and communication therapy for male-to-female transgender people is limited to adults. This paper provides rationale, procedures, and outcomes from voice and communication therapy for a male-to-female transgender adolescent 15 years of age. Treatment addressed vocal hygiene, breath support, fundamental frequency, intonation, resonance and vocal quality, and rate. Positive acoustic, perceptual, and client self-report outcomes confirm treatment effectiveness for this adolescent. Learning outcomes: The reader will be able to recognize common aspects of transgender voice and communication therapy provided by a speech-language pathologist. The reader will also be able to explain the effectiveness of therapy provided to an adolescent speaker.  相似文献   
994.
The aim of this study was to examine long-term changes in symptoms of post-traumatic stress disorder, depression, anxiety, and in health-related quality of life in traumatized refugees 23 months after admission to multidisciplinary treatment. The study group comprised 45 persons admitted to the Rehabilitation and Research Centre for Torture Victims in 2001 to 2002. Data on background, trauma, present social situation, mental symptoms (Hopkins Symptom Checklist-25, Hamilton Depression Scale, Harvard Trauma Questionnaire), and on health-related quality of life (World Health Organization Quality of Life-Bref) were collected before treatment and after 9 and 23 months. No substantial changes in mental health were observed at the 9-month follow-up, and the minor decrease in some symptoms observed between the 9 and 23 months may reflect regression toward the mean or the natural course of symptoms in this cohort. Thus, no clinically significant improvement was observed, but there is a need for further studies, in particular randomized trials evaluating the efficacy of various health-related and social interventions among severely traumatized refugees.  相似文献   
995.

Purpose

It is unknown whether immigrants working in the cleaning industry have a poorer health and work ability than cleaners from the native population. The main aim was to investigate differences in objective and self-reported health measures between immigrant and Danish cleaners.

Methods

Three hundred and fifty-one cleaners, consisting of 166 Danes (88% women) and 179 immigrants (74% women) (6 with unknown ethnicity), from 9 workplaces in Denmark participated in the study. Health and work ability were obtained by objective (e.g., BMI and blood pressure) and self-reported measures (e.g., work ability, self-rated health, and musculoskeletal symptoms). In order to investigate differences between Danish and immigrant cleaners, logistic regression analyses and General Linear Models were performed.

Results

When controlling for age, sex, workplace, job seniority, and smoking, more Danish compared with immigrant cleaners were current smokers (42% vs. 28%, p?p?p?p?p?p?p?p?p?p?Conclusions Although the health of the cleaners was alarmingly poor, the immigrant cleaners generally had a poorer self-reported health and work ability than the Danish cleaners. These findings highlight the need for occupational health actions among cleaners, particularly tailored to the immigrant subpopulation.  相似文献   
996.
Behavioural patterns in children of infertile couples may be influenced by both the underlying causes of infertility and stress in the couples. Treatment procedures, such as culture media and manipulation of gametes and embryos, may also result in developmental problems. We examined behavioural problems in children as a function of infertility and infertility treatment, using data from three population-based birth cohorts in Denmark (Aalborg-Odense Birth Cohort, Aarhus Birth Cohort and Danish National Birth Cohort). Information on time to pregnancy and infertility treatment was collected during pregnancy. Children aged between 7 and 21 years were assessed using the Strengths and Difficulties Questionnaire (SDQ). The SDQ was completed by mothers in all cohorts and, in addition, by teachers in the Aarhus cohort and by children themselves in the Aalborg-Odense cohort. Children born after a time to pregnancy of >12 months and no infertility treatment had a behavioural pattern similar to children of fertile parents. Teachers reported a higher total difficulties score for children born after infertility treatment, but no significant differences were seen on any subscales of the teachers' report, and neither the mothers nor the children reported any differences on the total difficulties score and the prosocial behaviour score. Our results are thus overall reassuring regarding behavioural problems in children born to infertile couples, regardless of infertility treatment.  相似文献   
997.
Scand J Caring Sci; 2012; 26; 228–235 How children handle life when their mother or father is seriously ill and dying Aims and objectives: The aim of this study was to describe and understand how children handle their life when a mother or father is dying. Methodological design and justification: The research design was phenomenological hermeneutic. The phenomenological approach enabled us to capture the concrete everyday life of the children as it is understood and experienced by the children themselves. The hermeneutical approach offered the possibility of reaching an understanding of the children’s experiences. Research Methods: Seven children aged 11‐17 years participated in the study. Data were collected using qualitative interviews and video diaries. Ethical considerations: The researcher complied with ethical guidelines that apply to all researchers and followed ethical guidelines for nursing research in the Nordic Countries (Northern Nurses Federation). The children’s names were changed, and the data were treated confidentially. Findings: Analysis produced an overarching theme of death’s waiting room, with following sub‐themes: Relating to death, when death becomes even more clearly manifest and handling life in death’s waiting room. Study limitations: This study focuses on a limited explored area; children’s lived life with a dying parent. The study limits itself to focusing on children’s life world; by choosing this focus, we have not included the relational aspects that are essential aspects of children’s lives. One might focus on these aspects in a second study to shed further light on the children’s lives. Conclusion: When children live in a family with a dying mother or father, they find that their home is transformed from a safe base into death’s waiting room. The children use a variety of ways to handle the confrontation with death. Avoiding talking to the children will not protect them from their thoughts about death.  相似文献   
998.

Purpose

To investigate associations between cancer survivors’ sex, age, and diagnosis in relation to their (1) need for rehabilitation, (2) participation in rehabilitation activities, and (3) unmet needs for rehabilitation in a 14-month period following date of diagnosis.

Methods

A population-based cohort study was performed on incident cancer patients diagnosed from 1 October 2007 to 30 September 2008. Fourteen months after diagnosis, participants completed a questionnaire developed to measure the aspects of rehabilitation. Logistic regression analyses were used to explore the association between sex, age, and diagnosis, and the outcome variables for rehabilitation.

Results

A total of 3,439 patients participated, yielding an overall response rate of 70%. One third of the cancer patients reported a need for physical rehabilitation and one third for psychological rehabilitation. Half of the patients participated in at least one activity. Unmet needs were most often reported in psychological, sexual, and financial areas. Women expressed more needs, participated more often in rehabilitation activities, and had, to a higher extent, their emotional needs fulfilled. Breast cancer patients participated more often in physical rehabilitation. Elderly who expressed rehabilitation needs more often had them unresolved.

Conclusions

A substantial variation in rehabilitation needs, participation in activities, and unmet needs in relation to sex, age, and cancer type was observed. Cancer care ought to systematically address the wide range of needs in all groups through integration of systematic needs assessment and targeted supply of offers.  相似文献   
999.
INTRODUCTION: There is clinical evidence that therapies targeting the vascular endothelial growth factor pathway are effective in delaying cancer progression. However, tumors may be either intrinsically resistant or evolve resistance to such therapies. Hence, there is a need for new therapies targeting angiogenesis. AREAS COVERED: The data are obtained by searching in the PubMed database. The search terms used included antiangiogenic therapy, TB-403 (RO5323441), placenta growth factor (PlGF) and VEGFR-1 (Flt-1). We review preclinical data concerning the function and inhibition of PlGF and summarize data on expression of PlGF in cancer patients. Data from early-phase clinical trials of TB-403 (RO5323441), a monoclonal antibody inhibiting PlGF, are discussed. Future development strategies, therapeutic potentials and limitations of TB-403 are further evaluated. EXPERT OPINION: There are some conflicting data on the function of PlGF and the importance of its role in primary tumor growth. Data from some preclinical models of PlGF inhibition and early-phase clinical trials with TB-403 are, however, promising, although the true potential of the drug is yet to be determined. Further clinical development should be preceded by molecular studies in the context of well-designed preclinical models and/or small translational studies. Future challenges involve identifying predictive biomarkers.  相似文献   
1000.
Extracorporeal removal of low-density lipoprotein (LDL) cholesterol by means of selective LDL apheresis is indicated in otherwise uncontrolled familial hypercholesterolemia. During blood-biomaterial interaction other constituents than the LDL particles are affected, including the complement system. We set up an ex vivo model in which human whole blood was passed through an LDL apheresis system with one of three different apheresis columns: whole blood adsorption, plasma adsorption and plasma filtration. The concentrations of complement activation products revealed distinctly different patterns of activation and adsorption by the different systems. Evaluated as the final common terminal complement complex (TCC) the whole blood system was inert, in contrast to the plasma systems, which generated substantial and equal amounts of TCC. Initial classical pathway activation was revealed equally for both plasma systems as increases in the C1rs-C1inh complex and C4d. Alternative pathway activation (Bb) was most pronounced for the plasma adsorption system. Although the anaphylatoxins (C3a and C5a) were equally generated by the two plasma separation systems, they were efficiently adsorbed to the plasma adsorption column before the "outlet", whereas they were left free in the plasma in the filtration system. Consequently, during blood-biomaterial interaction in LDL apheresis the complement system is modulated in different manners depending on the device composition.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号