全文获取类型
收费全文 | 3427篇 |
免费 | 272篇 |
国内免费 | 84篇 |
专业分类
耳鼻咽喉 | 36篇 |
儿科学 | 113篇 |
妇产科学 | 27篇 |
基础医学 | 425篇 |
口腔科学 | 51篇 |
临床医学 | 511篇 |
内科学 | 760篇 |
皮肤病学 | 58篇 |
神经病学 | 239篇 |
特种医学 | 357篇 |
外科学 | 299篇 |
综合类 | 62篇 |
预防医学 | 316篇 |
眼科学 | 29篇 |
药学 | 224篇 |
中国医学 | 8篇 |
肿瘤学 | 268篇 |
出版年
2022年 | 22篇 |
2021年 | 34篇 |
2020年 | 38篇 |
2019年 | 51篇 |
2018年 | 60篇 |
2017年 | 52篇 |
2016年 | 53篇 |
2015年 | 66篇 |
2014年 | 61篇 |
2013年 | 96篇 |
2012年 | 96篇 |
2011年 | 124篇 |
2010年 | 105篇 |
2009年 | 100篇 |
2008年 | 95篇 |
2007年 | 145篇 |
2006年 | 114篇 |
2005年 | 104篇 |
2004年 | 95篇 |
2003年 | 90篇 |
2002年 | 93篇 |
2001年 | 81篇 |
2000年 | 100篇 |
1999年 | 82篇 |
1998年 | 108篇 |
1997年 | 108篇 |
1996年 | 126篇 |
1995年 | 103篇 |
1994年 | 123篇 |
1993年 | 95篇 |
1992年 | 63篇 |
1991年 | 91篇 |
1990年 | 69篇 |
1989年 | 89篇 |
1988年 | 76篇 |
1987年 | 76篇 |
1986年 | 69篇 |
1985年 | 59篇 |
1984年 | 47篇 |
1983年 | 53篇 |
1982年 | 28篇 |
1981年 | 40篇 |
1980年 | 28篇 |
1979年 | 39篇 |
1978年 | 42篇 |
1977年 | 40篇 |
1976年 | 40篇 |
1975年 | 24篇 |
1973年 | 21篇 |
1969年 | 21篇 |
排序方式: 共有3783条查询结果,搜索用时 0 毫秒
1.
2.
3.
R Litzenberger K M Morgan S F Marden K N Jacobs-Irvine S A Bray 《The Journal of cardiovascular nursing》1991,5(2):58-66
This case study illustrates the chronic nature of hyperlipidemia type IIa and the important contribution of the nurse in helping the client adjust life style, manage complex health regimes, and cope with the uncertainty of disease progression and its associated risks. 相似文献
4.
Deborah Bray Preston Anthony R D'Augelli Cathy D Kassab Richard E Cain Frederick W Schulze Michael T Starks 《AIDS education and prevention》2004,16(4):291-303
Research investigating predictors of risky sexual behavior of rural MSM is sparse, even though the prevalence of HIV in rural areas has increased. This study explored two sets of predictors of 93 rural MSM's levels of risky sexual behavior: mental health variables and stigma emanating from men's family members, health care professionals, and people in the rural communities in which they live. Over 47% of the men were found to be at modified high to high risk. Logistic regression using a continuation logit model was used to test the relationship of the predictor variables and the four levels of risk. Findings indicate that self-esteem was predictive of the highest sexual risk behavior but not lower levels of risk. Stigma was predictive of modified high sexual risk when compared to low and no risk categories. No variables differentiated men at low risk from men at no risk. 相似文献
5.
6.
P P Vieyres J M de Bray J L Saumet F Patat L Pourcelot 《Journal of ultrasound in medicine》1994,13(11):887-893
A numerical model based on Navier-Stokes equations was used in conjunction with an experimental model in rabbits to study the effects of acute intracranial hypertension on basilar artery blood flow velocity. The hypertension was induced by pressure transmission via an epidural pressure sensor inserted into a parietal intracranial opening. A critical value of half of the diastolic arterial pressure for the intracranial cerebral pressure was determined by both numerical and experimental models. At this intracranial cerebral pressure level, the total input resistance and total input compliance, determined by the numerical model, exhibited an increase of 27% and 10%, respectively, and the tissular compliance a decrease of 25% from their physiologic baseline values. When the intracranial cerebral pressure reaches the level of the diastolic arterial pressure, a zero diastolic flow is observed into the cerebral vascular system. This study validates the theoretical model, which could be used in assessing intracranial cerebral pressure noninvasively in humans when O2 pressure can be stabilized. 相似文献
7.
8.
The comparison of disease risk in populations stratified by certain demographic variables provides important clues as to the underlying causes of disease. There are fundamental variations in the risk of occurrence of different cancers by gender, area of residence, and time of diagnosis. Men are, for instance, at considerably higher risk of developing most of the common cancers that occur in both sexes, and there are substantial variations in the occurrence of particular cancers in different regions of the World. This paper attempts to highlight some of these remarkable variations using cancer incidence data by sex, area of residence and year of diagnosis, emphasising the strong evidence that many of the contrasts can be appropriated to a number of modifiable “environmental” factors.Rates of cancer occurrence in the developed world are double that of less developed regions, although risk patterns are of very different magnitude and direction depending on the cancer site examined. Lung cancer is the most common neoplasm in men globally, but is overshadowed by prostate cancer in certain westernised countries, notably in the U.S. Cancers of the colon and rectum are important in the developed world, whereas stomach and liver cancer are common in developing areas.Men have systematically higher rates than women for the vast majority of the tumours that develop in both sexes, with the exception of thyroid cancer. There are also huge variations in the extent of the inequality: men have notably elevated risks, relative to women, of developing tumours of the head and neck, bladder, lung, oral cavity and liver.In Europe, incidence trends of lung cancer tend to be declining in men, although there is substantial between-country variation. In women, lung cancer rates are systematically on the increase in most Western, Southern and European countries. Trends in prostate cancer are increasing, as are trends in colorectal cancer (in both sexes), although more noticeably in Southern and Eastern Europe. Stomach cancer continues to fall in most European areas. Bladder cancer is decreasing in both men and women, apart from in Eastern Europe, whereas cancers of the kidney and non-Hodgkin lymphoma are steadily increasing in both sexes.We have estimated that men have better and more readily achievable prospects of avoiding death from cancer since they have lower rates of gender specific cancers, that are probably hormonal in origin, then women. Tobacco consumption plays a dominating role in the excess risk of cancer in men but it is apparent that the male excess disease burden can be effectively reduced by various prevention measures. As well as avoiding (or quitting) smoking, these include, moderating alcohol consumption, avoiding obesity, undertaking regular physical exercise, and maintaining a diet high in fruit and vegetables. The adoption of a healthier lifestyle will be of considerable benefit to the general health of both men and women, with an expectation of a major reduction in the burden of cancer, as well as other major diseases. 相似文献
9.
Larry R. Faulkner M.D. Joseph D. Bloom M.D. David L. Cutler M.D. James H. Shore M.D. J. Donald Bray M.D. Joseph Murray M.S. 《Community mental health journal》1987,23(4):260-270
The authors review the relationship that has evolved over the years between the Department of Psychiatry at Oregon Health Sciences University and Oregon's community and state mental health programs. They describe the compatibility that exists between the basic requirements of academic psychiatry departments and public mental health programs and demonstrate how these organizations have been able to fulfill one another's needs in Oregon. Specific examples of successful collaborations in the areas of education, administration, research, and service are presented to illustrate how relationships that have been designed to meet specific requirements of one organization can fulfill many requirements of both. Suggestions are provided for those organizations contemplating similar collaborative endeavors. 相似文献
10.