全文获取类型
收费全文 | 2984篇 |
免费 | 348篇 |
国内免费 | 40篇 |
专业分类
耳鼻咽喉 | 36篇 |
儿科学 | 118篇 |
妇产科学 | 67篇 |
基础医学 | 229篇 |
口腔科学 | 36篇 |
临床医学 | 539篇 |
内科学 | 740篇 |
皮肤病学 | 79篇 |
神经病学 | 399篇 |
特种医学 | 320篇 |
外科学 | 266篇 |
综合类 | 46篇 |
一般理论 | 2篇 |
预防医学 | 187篇 |
眼科学 | 39篇 |
药学 | 121篇 |
中国医学 | 1篇 |
肿瘤学 | 147篇 |
出版年
2023年 | 65篇 |
2022年 | 50篇 |
2021年 | 53篇 |
2020年 | 113篇 |
2019年 | 33篇 |
2018年 | 112篇 |
2017年 | 93篇 |
2016年 | 106篇 |
2015年 | 93篇 |
2014年 | 148篇 |
2013年 | 171篇 |
2012年 | 94篇 |
2011年 | 109篇 |
2010年 | 120篇 |
2009年 | 150篇 |
2008年 | 98篇 |
2007年 | 109篇 |
2006年 | 111篇 |
2005年 | 89篇 |
2004年 | 69篇 |
2003年 | 56篇 |
2002年 | 55篇 |
2001年 | 64篇 |
2000年 | 45篇 |
1999年 | 57篇 |
1998年 | 94篇 |
1997年 | 102篇 |
1996年 | 86篇 |
1995年 | 75篇 |
1994年 | 55篇 |
1993年 | 57篇 |
1992年 | 49篇 |
1991年 | 36篇 |
1990年 | 45篇 |
1989年 | 75篇 |
1988年 | 61篇 |
1987年 | 48篇 |
1986年 | 43篇 |
1985年 | 36篇 |
1984年 | 36篇 |
1983年 | 15篇 |
1982年 | 17篇 |
1981年 | 20篇 |
1980年 | 17篇 |
1979年 | 10篇 |
1978年 | 12篇 |
1977年 | 10篇 |
1976年 | 13篇 |
1975年 | 11篇 |
1971年 | 12篇 |
排序方式: 共有3372条查询结果,搜索用时 3 毫秒
1.
Judith Gere Ph.D. Lynn M. Martire Ph.D. Francis J. Keefe Ph.D. Mary Ann Parris Stephens Ph.D. Richard Schulz Ph.D. 《Annals of behavioral medicine》2014,48(3):337-346
Background
In addition to patient self-efficacy, spouse confidence in patient efficacy may also independently predict patient health outcomes. However, the potential influence of spouse confidence has received little research attention.Purpose
The current study examined the influence of patient and spouse efficacy beliefs for arthritis management on patient health.Methods
Patient health (i.e., arthritis severity, perceived health, depressive symptoms, lower extremity function), patient self-efficacy, and spouse confidence in patients’ efficacy were assessed in a sample of knee osteoarthritis patients (N?=?152) and their spouses at three time points across an 18-month period. Data were analyzed using structural equation models.Results
Consistent with predictions, spouse confidence in patient efficacy for arthritis management predicted improvements in patient depressive symptoms, perceived health, and lower extremity function over 6 months and in arthritis severity over 1 year.Conclusions
Our findings add to a growing literature that highlights the important role of spouse perceptions in patients’ long-term health. 相似文献2.
3.
Congenital anomalies of the kidneys or lower urinary tract (CAKUT) encompass a spectrum of anomalies that result from aberrations in spatio-temporal regulation of genetic, epigenetic, environmental, and molecular signals at key stages of urinary tract development. The Rearranged in Transfection (RET) tyrosine kinase signaling system is a major pathway required for normal development of the kidneys, ureters, peripheral and enteric nervous systems. In the kidneys, RET is activated by interaction with the ligand glial cell line-derived neurotrophic factor (GDNF) and coreceptor GFRα1. This activated complex regulates a number of downstream signaling cascades (PLCγ, MAPK, and PI3K) that control proliferation, migration, renewal, and apoptosis. Disruption of these events is thought to underlie diseases arising from aberrant RET signaling. RET mutations are found in 5–30 % of CAKUT patients and a number of Ret mouse mutants show a spectrum of kidney and lower urinary tract defects reminiscent of CAKUT in humans. The remarkable similarities between mouse and human kidney development and in defects due to RET mutations has led to using RET signaling as a paradigm for determining the fundamental principles in patterning of the upper and lower urinary tract and for understanding CAKUT pathogenesis. In this review, we provide an overview of studies in vivo that delineate expression and the functional importance of RET signaling complex during different stages of development of the upper and lower urinary tracts. We discuss how RET signaling balances activating and inhibitory signals emanating from its docking tyrosines and its interaction with upstream and downstream regulators to precisely modulate different aspects of Wolffian duct patterning and branching morphogenesis. We outline the diversity of cellular mechanisms regulated by RET, disruption of which causes malformations ranging from renal agenesis to multicystic dysplastic kidneys in the upper tract and vesicoureteral reflux or ureteropelvic junction obstruction in the lower tract. 相似文献
4.
5.
Sachin Talwar MS MCh Niwin George MS MCh Shyam Sunder Kothari MD DM Abhishek Sharma MS Keerthi Goondla MS Shiv Kumar Choudhary MS MCh 《Journal of cardiac surgery》2020,35(7):1690-1693
Rupture of sinus of valsalva following repair of tetralogy of fallot (TOF) is very rare. It should be suspected as a cause of recurrent or prolonged pleural effusion and congestive cardiac failure in patients who have undergone repair of TOF. We report one such patient. 相似文献
6.
Mumun Sinha MD Niraj N. Pandey MD S. H. Chandrashekhara MD Arun Sharma DM 《Journal of cardiac surgery》2020,35(7):1644-1646
We present a case of cyanotic congenital heart disease with left common carotid artery agenesis in the setting of the right aortic arch highlighting the potential implications in management. 相似文献
7.
Niraj Nirmal Pandey DM Mumun Sinha MD Sanjeev Kumar MD 《Journal of cardiac surgery》2020,35(7):1624-1625
We present a case of type B aortic dissection with a rare aortic arch branching variation whereby two separate brachiocephalic trunks arise from the arch. This case also highlights the potential implications of this variant in the management of thoracic aortic dissections and aneurysms. 相似文献
8.
Vineeta Ojha MD Sh Chandrashekhara DM Amarinder Singh Malhi DM Sanjeev Kumar MD 《Journal of cardiac surgery》2020,35(6):1340-1341
We present images from computed tomography angiography in a 40-year-old female with a calcified pseudo-aneurysm in her left coronary artery, who had previously undergone repair of tetralogy of Fallot. 相似文献
9.
BACKGROUND: Caring for an infant with unexplained, persistent crying is one of the most stressful events for new parents. Infant irritability, also referred to as infantile colic, occurs in 10-25% of all infants and is the most common parental concern reported in the first year of life. OBJECTIVE: The aim of this study was to evaluate the effectiveness of a home-based nursing intervention in reducing parenting stress in three groups of families with irritable infants, using data from a larger evaluation study. METHODS: A two-site, randomized clinical trial was conducted with 121 infants and their parents. Infants were randomized to a treatment or a control group. A third group of infants (n = 43) was added as a posttest-only comparison. The level of parenting stress was measured by the Parenting Stress Index (PSI) at baseline, after the 4-week intervention, and at the 8-week follow-up visit. RESULTS: A repeated measures analysis of variance (ANOVA) was used to compare the two groups across the three time points (baseline, immediately after the 4-week intervention, and at the 8-week follow-up visit). The results revealed a reduction in total parenting stress over time for both the treatment and control groups. Mothers in the treatment group reported reduced parenting stress on the parent-child dysfunctional interaction subscale (p = .04). Total parenting stress scores were found to be significantly higher for mothers in the posttest-only group (p = .009). CONCLUSION: Initial parenting stress levels were high in all participants. Parent feedback at the exit interview indicated that the nurse visits for data collection were also viewed as helpful in reducing the stress level associated with parenting these irritable infants. This home-based program was perceived as helpful in improving the interactions between parents and their irritable infants. 相似文献
10.
Joanne M. Bowen Rachel J. Gibson Adrian G. Cummins Dorothy M. K. Keefe 《Supportive care in cancer》2006,14(7):713-731
Intestinal mucositis occurs as a consequence of cytotoxic treatment through multiple mechanisms including induction of crypt cell death (apoptosis) and cytostasis. The molecular control of these actions throughout the gastrointestinal tract has yet to be fully elucidated; however, they are known to involve p53, the Bcl-2 family and caspases. This review will provide an overview of current research as well as identify areas where gaps in knowledge exist. 相似文献