全文获取类型
收费全文 | 39332篇 |
免费 | 2824篇 |
国内免费 | 164篇 |
专业分类
耳鼻咽喉 | 288篇 |
儿科学 | 1137篇 |
妇产科学 | 904篇 |
基础医学 | 4850篇 |
口腔科学 | 669篇 |
临床医学 | 3768篇 |
内科学 | 8826篇 |
皮肤病学 | 594篇 |
神经病学 | 4130篇 |
特种医学 | 1322篇 |
外国民族医学 | 1篇 |
外科学 | 5439篇 |
综合类 | 713篇 |
一般理论 | 31篇 |
预防医学 | 3219篇 |
眼科学 | 760篇 |
药学 | 2777篇 |
1篇 | |
中国医学 | 54篇 |
肿瘤学 | 2837篇 |
出版年
2023年 | 242篇 |
2022年 | 360篇 |
2021年 | 754篇 |
2020年 | 492篇 |
2019年 | 727篇 |
2018年 | 822篇 |
2017年 | 637篇 |
2016年 | 701篇 |
2015年 | 851篇 |
2014年 | 1192篇 |
2013年 | 1700篇 |
2012年 | 2489篇 |
2011年 | 2762篇 |
2010年 | 1558篇 |
2009年 | 1454篇 |
2008年 | 2351篇 |
2007年 | 2665篇 |
2006年 | 2547篇 |
2005年 | 2623篇 |
2004年 | 2392篇 |
2003年 | 2269篇 |
2002年 | 2106篇 |
2001年 | 406篇 |
2000年 | 337篇 |
1999年 | 469篇 |
1998年 | 509篇 |
1997年 | 380篇 |
1996年 | 389篇 |
1995年 | 309篇 |
1994年 | 288篇 |
1993年 | 289篇 |
1992年 | 265篇 |
1991年 | 259篇 |
1990年 | 221篇 |
1989年 | 206篇 |
1988年 | 218篇 |
1987年 | 208篇 |
1986年 | 160篇 |
1985年 | 236篇 |
1984年 | 283篇 |
1983年 | 241篇 |
1982年 | 265篇 |
1981年 | 275篇 |
1980年 | 268篇 |
1979年 | 177篇 |
1978年 | 172篇 |
1977年 | 157篇 |
1976年 | 149篇 |
1975年 | 101篇 |
1974年 | 128篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Philip G. Ney 《Canadian Medical Association journal》1991,144(8):956-957
82.
83.
84.
85.
Background : The present paper addressed the issue of whether pretreatment with intravenous (IV) chemotherapy affects response rate or survival in patients receiving hepatic artery chemotherapy (HAC). Methods : Case note reviews of 164 patients treated in a teaching hospital from June 1990 to July 1996 were carried out. Results : The response rate and carcino-embryonic antigen (CEA) fall in the two groups was almost identical. There was a nonsignificant survival advantage in the non-pretreatment group. Conclusions : Previous administration of IV chemotherapy did not affect the CEA response of patients receiving HAC. 相似文献
86.
87.
Philip W. H. Peng David T. Wong David Bevan Michael Gardam 《Journal canadien d'anesthésie》2003,50(10):989-997
PURPOSE: To describe the outbreak of severe acute respiratory syndrome (SARS) in Toronto, its impact on anesthesia practice and the infection control guidelines adopted to manage patients in the operating room (OR) and to provide emergency intubation outside the OR. Clinical features: The SARS outbreak in Toronto was the result of a single index patient. The causative virus, SARS-CoV, is moderately contagious, and is spread by droplets and contact. The virus gains access to host through the mucosa of the respiratory tract and the eyes. It can affect both healthy and compromised patients. The use of several precautionary measures such as goggles, gloves, gowns and facemasks and the application of various infection control strategies designed to minimize the spread of the virus are discussed. CONCLUSION: In containing the spread of SARS, vigilance and strict infection control are important. This results in the rediscovery of standards of infection control measures in daily anesthesia practice. 相似文献
88.
Philip J. Bossart M.D. F.A.C.E.P. Lenard Brunsdale M.D. Matt Hughes M.D. B. J. Manaster M.D. Ph.D. Anthony Doyle M.D. Kathy Murray M.D. David Tripp Ph.D. 《Emergency radiology》1997,4(1):26-29
To determine the utility of the lateral view of the chest in emergency department patients, records of all patients who had had 2-view chest x-rays ordered in the emergency department were reviewed retrospectively. A study radiologist recorded a reading of the posteroanterior (PA) radiograph alone. The lateral radiograph was then provided, along with the PA view, and a second reading was recorded. A comparison was then made between the first and second readings.A total of 417 sets of x-rays were included. The PA view alone successfully diagnosed or suspected 92% of pulmonary nodules, 95% of effusions, 97% of cases of emphysema, 98% of pneumonias, and 100% of cases of cardiomegaly, pulmonary edema, interstitial pulmonary disease, and atelectasis.In the emergency department patient population, lateral views of the chest have minimal diagnostic yield and therefore may be used selectively to safely decrease the amount of breast radiation exposure to young women. 相似文献
89.
Radionuclide targeting and dosimetry at the microscopic level: the role of microautoradiography 总被引:1,自引:0,他引:1
Matthew R. B. Puncher Philip J. Blower 《European journal of nuclear medicine and molecular imaging》1994,21(12):1347-1365
The understanding of localisation mechanisms and microdosimetry of diagnostic and therapeutic radiopharmaceuticals depends
on knowledge of their biodistribution at the microscopic level (cellular and subcellular) in the target tissues. Various methods
have been advanced for obtaining information about this microdistribution: subcellular fractionation, secondary ion mass spectrometry
imaging, microprobe elemental analysis in the electron microscope, and microautoradiography. This review compares these approaches,
and discusses in detail the methodology of microautoradiography (the most generally useful approach) with imaging and therapy
radionuclides. Literature examples of applications of microautoradiography in nuclear medicine are reviewed, and the future
potential contribution of the techniques is assessed. 相似文献
90.