全文获取类型
收费全文 | 192862篇 |
免费 | 1878篇 |
国内免费 | 130篇 |
专业分类
耳鼻咽喉 | 1315篇 |
儿科学 | 7022篇 |
妇产科学 | 3380篇 |
基础医学 | 18486篇 |
口腔科学 | 2189篇 |
临床医学 | 13585篇 |
内科学 | 36356篇 |
皮肤病学 | 1144篇 |
神经病学 | 17682篇 |
特种医学 | 9191篇 |
外科学 | 31280篇 |
综合类 | 2395篇 |
一般理论 | 9篇 |
预防医学 | 19194篇 |
眼科学 | 3070篇 |
药学 | 10433篇 |
中国医学 | 668篇 |
肿瘤学 | 17471篇 |
出版年
2023年 | 149篇 |
2022年 | 331篇 |
2021年 | 774篇 |
2020年 | 355篇 |
2019年 | 713篇 |
2018年 | 22622篇 |
2017年 | 17762篇 |
2016年 | 19882篇 |
2015年 | 1388篇 |
2014年 | 1574篇 |
2013年 | 1632篇 |
2012年 | 8449篇 |
2011年 | 22487篇 |
2010年 | 19574篇 |
2009年 | 12237篇 |
2008年 | 20558篇 |
2007年 | 22809篇 |
2006年 | 1543篇 |
2005年 | 3139篇 |
2004年 | 4275篇 |
2003年 | 5075篇 |
2002年 | 3232篇 |
2001年 | 456篇 |
2000年 | 626篇 |
1999年 | 347篇 |
1998年 | 336篇 |
1997年 | 323篇 |
1996年 | 175篇 |
1995年 | 151篇 |
1994年 | 155篇 |
1993年 | 102篇 |
1992年 | 119篇 |
1991年 | 156篇 |
1990年 | 192篇 |
1989年 | 133篇 |
1988年 | 100篇 |
1987年 | 73篇 |
1986年 | 53篇 |
1985年 | 53篇 |
1984年 | 37篇 |
1983年 | 38篇 |
1982年 | 37篇 |
1980年 | 52篇 |
1974年 | 26篇 |
1970年 | 31篇 |
1968年 | 28篇 |
1938年 | 60篇 |
1934年 | 30篇 |
1932年 | 56篇 |
1930年 | 46篇 |
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
151.
Raymond J. Gibbons 《Journal of nuclear cardiology》1994,1(5):S118-S130
Both radionuclide angiography and myocardial perfusion imaging provide important insights that determine the management of patients with stable coronary artery disease. Both nuclear cardiology procedures have clearly demonstrated use in the noninvasvie identification of severe (left main or three-vessel) coronary artery disease and the noninvasive assessment of prognosis and thereby determine which patients should be sent to coronary angiography. Both radionuclide angiography and myocardial perfusion imaging provide prognostic information that is independent of resting left ventricular function and coronary anatomy and thereby influence the decision regarding which patients should be sent to coronary revascularization. This review considers the evidence supporting the uses of these nuclear cardiology procedures and provides suggestions regarding their cost-effective application. 相似文献
152.
153.
Richard N. Bradley 《Disease Management & Health Outcomes》2003,11(5):321-325
Acute stroke affects large numbers of people worldwide. It causes significant morbidity and mortality. Data support the hypothesis that the public is not familiar with either the risk factors or the signs of stroke. Educating the public about stroke may result in a lower incidence of the disease as individuals modify their risk factors, and in improved outcomes as a result of reductions in delays to treatment. There is clear and convincing evidence that reducing delays to treatment of patients with acute stroke results in improved outcomes. Public education programs should be broad-based, tailored to individual audiences, and carry a common theme. 相似文献
154.
Farzad Mostashari Annie Fine Debjani Das John Adams Marcelle Layton 《Journal of urban health》2003,80(1):i43-i49
In 1998, the New York City Department of Health and the Mayor’s Office of Emergency Management began monitoring the volume of ambulance dispatch calls as a surveillance tool for biologic terrorism. We adapted statistical techniques designed to measure excess influenza mortality and applied them to outbreak detection using ambulance dispatch data. Since 1999, we have been performing serial daily regressions to determine the alarm threshold for the current day. In this article, we evaluate this approach by simulating a series of 2,200 daily regressions. In the influenza detection implementation of this model, there were 71 (3.2%) alarms at the 99% level. Of these alarms, 64 (90%) occurred shortly before or during a period of peak influenza in each of six influenza seasons. In the bioterrorism detection implementation of this methodology, after accounting for current influenza activity, there were 24 (1.1%) alarms at the 99% level. Two occurred during a large snowstorm, 1 is unexplained, and 21 occurred shortly before or during a period of peak influenza activity in each of six influenza seasons. Our findings suggest that this surveillance system is sensitive to communitywide respiratory outbreaks with relatively few false alarms. More work needs to be done to evaluate the sensitivity of this approach for detecting nonrespiratory illness and more localized outbreaks. 相似文献
155.
156.
157.
Ana Sánchez-Romero Israel Oliver David Costa Albina Orduña Javier Lacueva Francisco Pérez-Vicente Antonio Arroyo Rafael Calpena 《Clinical & translational oncology》2006,8(4):294-295
Lung cancer is the most prevalent malignancy in western countries and most of the patients present at advanced stages, but
single splenic metastasis is exceptional instead. We report on a case of a seventy-three-year old male presenting with non-hemoptoic
productive cough, constitutional syndrome and pain in the left lower quadrant. Physical examination and complementary radiological
and hystologycal procedures revealed the presence of an adenocarcinoma of the left lung with probable splenic metastasis.
The patient underwent splenectomy, which confirmed the diagnose of splenic metastasis of lung adenocarcinoma and, secondly,
lung resection was performed. Topics about lung cancer metastasis are discussed. 相似文献
158.
α<Subscript>2β</Subscript> adrenoreceptor 301–303 deletion polymorphism in polycystic ovary syndrome
Alexandros D. Saltamavros George Adonakis Sosanna Kritikou Vasiliki Koika Kleanthis Koufogiannis Kostas Spyropoulos George Kourounis Christodoulos Flordellis Venetsana Kyriazopoulou Neoklis A. Georgopoulos 《Clinical autonomic research》2007,17(2):112-114
α2β adrenoreceptor 301–303 deletion polymorphism does not influence basal metabolic rate, insulin resistance or weight gain in
Greek women with polycystic ovary syndrome. 相似文献
159.
160.