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   35023篇
  免费   2030篇
  国内免费   276篇
耳鼻咽喉   451篇
儿科学   659篇
妇产科学   558篇
基础医学   4365篇
口腔科学   1581篇
临床医学   2893篇
内科学   9319篇
皮肤病学   423篇
神经病学   3517篇
特种医学   1324篇
外科学   5398篇
综合类   95篇
一般理论   7篇
预防医学   1567篇
眼科学   573篇
药学   1881篇
中国医学   84篇
肿瘤学   2634篇
  2024年   39篇
  2023年   377篇
  2022年   705篇
  2021年   1333篇
  2020年   791篇
  2019年   1092篇
  2018年   1277篇
  2017年   994篇
  2016年   1119篇
  2015年   1190篇
  2014年   1547篇
  2013年   1886篇
  2012年   2924篇
  2011年   2802篇
  2010年   1576篇
  2009年   1438篇
  2008年   2260篇
  2007年   2353篇
  2006年   2129篇
  2005年   1933篇
  2004年   1732篇
  2003年   1564篇
  2002年   1359篇
  2001年   269篇
  2000年   241篇
  1999年   252篇
  1998年   250篇
  1997年   208篇
  1996年   158篇
  1995年   150篇
  1994年   132篇
  1993年   114篇
  1992年   123篇
  1991年   97篇
  1990年   82篇
  1989年   56篇
  1988年   87篇
  1987年   62篇
  1986年   47篇
  1985年   65篇
  1984年   55篇
  1983年   44篇
  1982年   51篇
  1981年   30篇
  1980年   29篇
  1979年   41篇
  1978年   31篇
  1974年   23篇
  1973年   32篇
  1972年   28篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Whereas there is evidence that interpersonal communication, or conversation, influences predictors of alcohol consumption, the role of involvement in conversation effects remains unclear. This study explored how three aspects of involvement (topical relevance, or how relevant the topic of alcohol is; conversational relevance, or how relevant a conversation about alcohol is; and conversational effort, or how much effort people put into such a conversation), influence conversation effects. After assessing topical relevance, 46 same-sex dyads were requested to talk about the negative consequences of heavy drinking. Within each dyad, one participant was asked to take on an active talking role and the other participant a passive listening role. Next, conversational relevance, effort, and predictors of heavy drinking were measured. Results showed that participants who drank more alcohol found the topic of heavy drinking more relevant. This topical relevance increased conversational relevance and conversational effort. Conversational effort further increased when a talking role was assigned. Furthermore, participants who put more effort in the conversation and found it more relevant had more positive norms, identified more strongly with alcohol, and had higher intentions to drink. These findings suggest that more involvement in an alcohol-related conversation does not always lead to desirable outcomes.  相似文献   
2.
Sinus venosus atrial septal defect (SV‐ASD) usually coexists with partial anomalous pulmonary vein connection (PAPVC). It is a difficult diagnosis in transthoracic echocardiography (TTE) due to eccentric position of defects. We present a rare case of atypical anatomical variation in PAPVC, which was never described before. Two right pulmonary veins drained into superior vena cava, which overrode SV‐ASD and interatrial septum, a third pulmonary vein into the right atrium. Complete diagnosis could not be set after TTE, nor transesophageal echocardiography, whereas angio‐CT was finally conclusive. This diagnostic approach allowed the surgical planning.  相似文献   
3.
Graefe's Archive for Clinical and Experimental Ophthalmology - To estimate the impact of delayed care during the coronavirus disease 2019 (COVID-19) pandemic on the outcomes of patients with...  相似文献   
4.
5.
6.
Cholangiocarcinoma(CCA) is a malignant tumor of the biliary system and includes, according to the anatomical classification, intra hepatic CCA(iCCA),hilar CCA(hCCA) and distal CCA(dCCA). Hilar CCA is the most challenging type in terms of diagnosis, treatment and prognosis. Surgery is the only treatment possibly providing long-term survival, but only few patients are considered resectable at the time of diagnosis. In fact, tumor's extension to segmentary or subsegmentary biliary ducts, along with large lymph node involvement or intrahepatic metastases, precludes the surgical approach. To achieve R0 margins is mandatory for the disease-free survival and overall survival. In case of unresectable locally advanced hCCA, radiochemotherapy(RCT) as neoadjuvant treatment demonstrated to be a therapeutic option before either hepatic resection or liver transplantation. Before liver surgery, RCT is believed to enhance the R0 margins rate. For patients meeting the Mayo Clinic criteria, RCT prior to orthotopic liver transplant(OLT) has proved to produce acceptable 5-years survivals. In this review, we analyze the current role of neoadjuvant RCT before resection as well as before OLT.  相似文献   
7.
8.
9.
Digestive Diseases and Sciences - To determine whether the presence of portal vein thrombosis (PVT) where venous flow within the liver may be altered may delay the diagnosis of HCC and be...  相似文献   
10.
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