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   7990篇
  免费   658篇
  国内免费   14篇
耳鼻咽喉   62篇
儿科学   376篇
妇产科学   195篇
基础医学   1094篇
口腔科学   33篇
临床医学   969篇
内科学   1498篇
皮肤病学   156篇
神经病学   890篇
特种医学   114篇
外科学   917篇
综合类   62篇
一般理论   12篇
预防医学   1224篇
眼科学   57篇
药学   517篇
中国医学   6篇
肿瘤学   480篇
  2024年   24篇
  2023年   170篇
  2022年   227篇
  2021年   503篇
  2020年   307篇
  2019年   462篇
  2018年   476篇
  2017年   345篇
  2016年   325篇
  2015年   306篇
  2014年   456篇
  2013年   506篇
  2012年   812篇
  2011年   763篇
  2010年   321篇
  2009年   248篇
  2008年   503篇
  2007年   412篇
  2006年   353篇
  2005年   316篇
  2004年   268篇
  2003年   214篇
  2002年   197篇
  2001年   16篇
  2000年   5篇
  1999年   15篇
  1998年   25篇
  1997年   16篇
  1996年   14篇
  1995年   9篇
  1994年   9篇
  1993年   4篇
  1992年   4篇
  1991年   2篇
  1990年   4篇
  1989年   1篇
  1988年   1篇
  1987年   1篇
  1986年   4篇
  1984年   1篇
  1983年   3篇
  1981年   4篇
  1980年   1篇
  1978年   2篇
  1976年   1篇
  1975年   1篇
  1974年   2篇
  1972年   1篇
  1961年   1篇
  1949年   1篇
排序方式: 共有8662条查询结果,搜索用时 15 毫秒
991.
In this Article, the role of polymorphisms in the MMP1, MMP9and MMP12 genes in the rate of decline of lung function wasstudied. A rapid rate of decline was associated with the G-1607GGpolymorphism and haplotypes consisting of alleles from the MMP1G-1607GG and MMP12 Asn357Ser polymorphisms. Erroneously, thedesignation of  相似文献   
992.
Intimate Partner Violence and Patient Screening across Medical Specialties   总被引:3,自引:1,他引:2  
Objectives: The aims of this study were to compare rates of intimate partner violence (IPV) across different medical specialties and health care sites in one metropolitan area, describe demographic characteristics of women with abusive partners, characterize health care provider assessment of IPV, and describe patient characteristics associated with health care assessment for partner violence. Methods: Women (N= 2,465) completed written surveys about partner violence and health care screening for violence in the waiting rooms of five types of health care settings (obstetrician/gynecologist office, emergency department, primary care office, pediatrics, and addiction recovery) across eight different hospitals in the greater Boston area. Results: The overall survey response rate was 62%. The 12‐month prevalence rate of IPV was 14%, with 37% disclosing lifetime prevalence. The highest rates of recent IPV were disclosed in the hospital‐based addiction recovery unit (36%) and in emergency departments (17%). Adjusted demographic risk characteristics for IPV included age (younger than 24 years), low income, and unemployment. Health care providers were more likely to discuss IPV with low‐income women than with middle‐ or high‐income women but were no more likely to assess violence within the youngest age group. Among women who disclosed abuse to their health care provider, 50% reported receiving direct interventions or services as a result. Conclusions: Using the same instrument and protocol, different rates of IPV and detection of IPV were found across medical departments, with the highest rates in emergency departments and an addiction recovery program. It is especially important for assessment of IPV to include young women who present to medical departments.  相似文献   
993.
Longitudinal stress fractures are an uncommon injury in which a diaphyseal fracture line occurs parallel to the long axis of a bone in the absence of direct trauma. They have been described in the tibia and less commonly in the femur but apparently not in the upper limb. We report a longitudinal stress fracture occurring in the humerus of a 62-year-old woman who had a history of osteoporosis and had undergone recent surgery of the contralateral wrist. We present the radiographic, MRI, and CT features of the case and emphasize the difficulties in diagnosis caused by negative findings on early radiographs and by nonspecific bone marrow edema pattern on MRI. The risk of a contralateral upper extremity stress fracture from activities of daily living in a patient with osteoporosis whose other upper extremity is immobilized also is highlighted.  相似文献   
994.
995.
996.
Apoptosis or programmed cell death is often altered in malignancies and is frequently determined by the terminal transferase-mediated nick end labeling technique (TUNEL). However, commercially available protocols can produce high background and false-positive staining, which renders the distinction between apoptosis and necrosis difficult. In an attempt to develop a rapid and reproducible method for detecting and quantifying apoptosis, we coupled optimization of the Apoptag Plus Peroxidase In Situ Apoptosis Detection kit with quantitative histomorphometric computer imaging software using the Bacus Laboratories Incorporated Slide Scanner (BLISS). Multiple (200-350) unique 40x images were scanned using the BLISS system and downloaded into the WebSlide Browser program, creating a permanent, scanned record of the area assessed. The stored images were counted, with the final analysis simultaneously taking into account cells that were immunohistochemically positive and the histology of the surrounding cells to reduce the possibility of false positive and negative staining. In addition, cells with equivocal staining can be simultaneously reviewed by other technologists with networked WebSlide Browser access to the same images. Our data show that the advantages offered by the BLISS imaging software greatly reduce the potential drawbacks of using the TUNEL method as a sole means of quantification.  相似文献   
997.
This study examined trends in notifications of potential exposure to Australian bat lyssavirus reported to the Brisbane Southside Public Health Unit, Australia between 1 November 1996 and 31 January 2003. Notification rates declined among all population groups and potential exposures were notified more promptly. Concern exists regarding possible under-reporting of potential exposure to Australian bat lyssavirus especially among volunteer bat carers.  相似文献   
998.
We surveyed program coordinators at 106 hospitals and health departments that participated in the National Smallpox Vaccination Program to ascertain how program-level factors affected the rate of smallpox vaccine uptake by staff. In a fully adjusted multivariate model, health departments achieved significantly higher vaccination rates than did hospitals, as did facilities that invited fewer employees to be vaccinated.  相似文献   
999.
Equity in health and health care is animportant issue. It has been proposed that thepursuit of equity in health care is beinghampered by the dominance of individualism inhealth care practices. This paper explores theway in which communitarian ideals and practicesmight lend themselves to the pursuit of equity.Communitarians acknowledge, respect and fosterthe bonds that unite and identify communities.The paper argues that, to achieve equity inhealth care, these bonds need to be recognisedand harnessed rather than ignored. The notionof individual autonomy in the context of thecommunity is examined. Alternative concepts ofautonomy – social autonomy and communityautonomy – are seen to be more respectful andnurturing of both the individual and thecommunity. Moreover, these concepts appeardesirable for the pursuit of health care equitygoals. The paper concludes with some thoughtsabout how equity in Australia's health caresystem can reasonably progress within acommunitarian vision. Disadvantaged communitiesare discussed throughout, in particular,Australian Aboriginal communities.  相似文献   
1000.
Moreno  Megan A. 《JAMA》2003,289(8):956
  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