全文获取类型
收费全文 | 82373篇 |
免费 | 8646篇 |
国内免费 | 188篇 |
专业分类
耳鼻咽喉 | 1055篇 |
儿科学 | 2508篇 |
妇产科学 | 1910篇 |
基础医学 | 9990篇 |
口腔科学 | 2111篇 |
临床医学 | 13744篇 |
内科学 | 15233篇 |
皮肤病学 | 1017篇 |
神经病学 | 7526篇 |
特种医学 | 2213篇 |
外国民族医学 | 3篇 |
外科学 | 9766篇 |
综合类 | 1284篇 |
一般理论 | 79篇 |
预防医学 | 10436篇 |
眼科学 | 1802篇 |
药学 | 5165篇 |
1篇 | |
中国医学 | 69篇 |
肿瘤学 | 5295篇 |
出版年
2023年 | 899篇 |
2022年 | 744篇 |
2021年 | 1553篇 |
2020年 | 1269篇 |
2019年 | 1608篇 |
2018年 | 2288篇 |
2017年 | 1930篇 |
2016年 | 1931篇 |
2015年 | 2131篇 |
2014年 | 2851篇 |
2013年 | 4026篇 |
2012年 | 4885篇 |
2011年 | 5153篇 |
2010年 | 3096篇 |
2009年 | 3055篇 |
2008年 | 4498篇 |
2007年 | 4537篇 |
2006年 | 4375篇 |
2005年 | 4357篇 |
2004年 | 3956篇 |
2003年 | 3618篇 |
2002年 | 3519篇 |
2001年 | 1508篇 |
2000年 | 1419篇 |
1999年 | 1494篇 |
1998年 | 1051篇 |
1997年 | 875篇 |
1996年 | 901篇 |
1995年 | 741篇 |
1994年 | 746篇 |
1993年 | 682篇 |
1992年 | 1107篇 |
1991年 | 1058篇 |
1990年 | 1017篇 |
1989年 | 943篇 |
1988年 | 882篇 |
1987年 | 868篇 |
1986年 | 828篇 |
1985年 | 819篇 |
1984年 | 660篇 |
1983年 | 585篇 |
1982年 | 421篇 |
1981年 | 427篇 |
1980年 | 372篇 |
1979年 | 520篇 |
1978年 | 418篇 |
1977年 | 349篇 |
1974年 | 396篇 |
1973年 | 375篇 |
1971年 | 328篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
Megan L. Robbins Robert C. Wright Ana María López Karen Weihs 《Journal of psychosocial oncology》2019,37(2):160-177
AbstractObjectives: This study examined word use as an indicator of interpersonal positive reframing in daily conversations of couples coping with breast cancer and as a predictor of stress.Design: The Electronically Activated Recorder (EAR) and Linguistic Inquiry and Word Count (LIWC) were used to examine naturally occurring word use conceptually linked to positive reframing (positive emotion, negative emotion, and cognitive processing words).Sample: Fifty-two couples coping with breast cancer.Methods: Couples wore the EAR, a device participants wear, that audio-recorded over one weekend (>16,000 sound files), and completed self-reports of positive reframing (COPE) and stress (Perceived Stress Scale). LIWC, a software program, measured word use.Findings: Both partners’ word use (i.e., positive emotion and cognitive processing words) was associated with their own reported positive reframing, and spouses’ word use was also indicative of patients’ positive reframing. Results also revealed that, in general, words indicating positive reframing predicted lower levels of stress.Conclusions: Findings supported the hypothesis that partners—and particularly spouses of breast cancer patients—may assist each other’s coping by positively reframing the cancer experience and other negative experiences in conversation. 相似文献
4.
5.
6.
7.
Allison J. Cowin PhD ; Nicholas Hatzirodos BSc ; Justin Rigden PhD ; Robert Fitridge FRACS ; David A. Belford PhD 《Wound repair and regeneration》2006,14(4):421-426
High levels of tumor necrosis factor-alpha (TNF-alpha), a pro-inflammatory cytokine, are present in the wound fluid of chronic nonhealing wounds. This leads to increased inflammation, cytokine expression, and ultimately results in impaired wound healing and tissue destruction. Etanercept is a recombinant fusion protein that consists of the soluble TNF receptor (p75) linked to the Fc portion of human IgG1. It is an effective inhibitor of TNF-alpha and has been shown to provide rapid and sustained improvement in rheumatoid arthritis by acting as a soluble receptor binding TNF-alpha and preventing its proinflammatory activities. Therefore, the aim of this study was to determine whether Etanercept could inhibit TNF-alpha activity in chronic wound fluid. Wound fluid was collected from the venous leg ulcers of 16 different patients. The effect of Etanercept on TNF-alpha activity was evaluated using both a TNF-alpha bioassay and an enzyme-linked immunoassay. Etanercept was found to reduce the cytotoxic effect of chronic wound fluid on L929 fibroblasts by approximately 30% and neutralized TNF-alpha binding in the enzyme-linked immunoassay by up to 80%. Direct application of Etanercept to chronic wounds may therefore reduce the inflammatory activity of TNF-alpha, which could reduce the chronicity of venous leg ulcers and thus aid in the healing of these wounds. 相似文献
8.
Karen MacKinnon Marjorie McIntyre 《Revue canadienne de recherche en sciences infirmières》2006,38(2):56-72
With the recent introduction of preterm birth prevention programs there has been a shift in our understanding of what the presence of contractions during pregnancy means and a reconstituting of risk in ways that position increasing numbers of women at risk for preterm birth. This paper highlights the findings of a study exploring the influences of risk discourses on women's experiences of preterm labour. The primary goals of this institutional ethnographic study were to describe the effects of societal discourses, institutional structures, and nursing work processes on the everyday lives of childbearing women experiencing preterm labour. The findings suggest that risk discourses exert social control over pregnant women and result in fear, guilt, feelings of being judged or punished, and an overwhelming sense of personal responsibility for preventing preterm birth.The study also exposes ways in which biomedical constructions of risk and preterm labour affect the organization of health services, including nursing practice. 相似文献
9.
Peter Stone MD FRNZCOG FRCOG David Cook FRNZCOG MRCOG John Hutton PhD FRNZCOG FRCOG Gordon Purdie BSc Henry Murray MD FRNZCOG MRCOG Lauren Harcourt MPP BA 《The Australian & New Zealand journal of obstetrics & gynaecology》1995,35(1):32-37
Summary: This is the first report of the largest study of blood pressure measurement in pregnancy in a New Zealand population using standardized definitions and methodology. Over 3,800 women who delivered in an 8-month period in the Wellington region were included in the study. Blood pressure measurement and the presence of oedema and proteinuria were recorded from booking until delivery and in the puerperium. Only 2.7% of women were unable to be contacted after delivery for details on outcomes. The results established normal ranges for blood pressure throughout pregnancy. The data show that Mood pressure greater than 140/90 until 35 weeks' gestation is outside 2 standard deviations at all gestations and justifies using these measurements as the definition of hypertension in pregnancy. The fall in blood pressure in the 2nd trimester was less than 1 mm Ffg per week in both the systolic and diastolic pressures. This fall was smaller than previously recorded in other studies. Gestational hypertension was the commonest blood pressure abnormality occurring in 15.2% of the population. This represented 69% of the pregnant women with a hypertensive disorder. The overall incidence of both gestational hypertension and preeclampsia was 18.5% which is higher than reported in other parts of the world. In this study obesity was significantly associated with hypertensive disorders in pregnancy. An arm circumference of >33 cm, one of the measurements of obesity, was found in 6.8% of the study population. Even after the effect of arm circumference was taken into account, hypertensive disorders were also more common in Pacific Island women. Ankle oedema was significantly associated with the development of both gestational hypertension and preeclampsia but the incidence of oedema was noted in only 11.9% of the subjects. 相似文献
10.
We report a case of vasoactive-agent-induced priapism successfully treated in the emergency department with 10 mg of metaraminol injected into the corpora cavernosa. 相似文献