全文获取类型
收费全文 | 353008篇 |
免费 | 28464篇 |
国内免费 | 6171篇 |
专业分类
耳鼻咽喉 | 2370篇 |
儿科学 | 6434篇 |
妇产科学 | 6996篇 |
基础医学 | 71037篇 |
口腔科学 | 9942篇 |
临床医学 | 44222篇 |
内科学 | 56671篇 |
皮肤病学 | 5093篇 |
神经病学 | 30096篇 |
特种医学 | 12965篇 |
外国民族医学 | 35篇 |
外科学 | 34013篇 |
综合类 | 18547篇 |
现状与发展 | 68篇 |
一般理论 | 23篇 |
预防医学 | 20840篇 |
眼科学 | 5565篇 |
药学 | 29765篇 |
125篇 | |
中国医学 | 3631篇 |
肿瘤学 | 29205篇 |
出版年
2023年 | 9682篇 |
2022年 | 15038篇 |
2021年 | 17955篇 |
2020年 | 18292篇 |
2019年 | 11888篇 |
2018年 | 13256篇 |
2017年 | 13050篇 |
2016年 | 14214篇 |
2015年 | 16258篇 |
2014年 | 27978篇 |
2013年 | 23825篇 |
2012年 | 20289篇 |
2011年 | 19762篇 |
2010年 | 19503篇 |
2009年 | 18376篇 |
2008年 | 11179篇 |
2007年 | 11445篇 |
2006年 | 9921篇 |
2005年 | 8385篇 |
2004年 | 7251篇 |
2003年 | 6879篇 |
2002年 | 6485篇 |
2001年 | 6132篇 |
2000年 | 5217篇 |
1999年 | 5197篇 |
1998年 | 4126篇 |
1997年 | 3478篇 |
1996年 | 3691篇 |
1995年 | 3227篇 |
1994年 | 2606篇 |
1993年 | 2126篇 |
1992年 | 2212篇 |
1991年 | 2230篇 |
1990年 | 2194篇 |
1989年 | 1974篇 |
1988年 | 2175篇 |
1987年 | 1921篇 |
1986年 | 1676篇 |
1985年 | 1466篇 |
1984年 | 1442篇 |
1983年 | 1269篇 |
1982年 | 1231篇 |
1981年 | 1095篇 |
1980年 | 1029篇 |
1979年 | 1011篇 |
1978年 | 913篇 |
1977年 | 747篇 |
1976年 | 749篇 |
1974年 | 703篇 |
1973年 | 673篇 |
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
71.
72.
73.
Background:We aim to evaluate the efficiency of Raman spectroscopy (RS) in diagnosing suspected patients with intrahepatic cholangiocarcinoma (ICC), manifested by diagnostic sensitivity, specificity, and accuracy.Methods:We will research widely the articles concerning the use of RS in ICC through authenticated database including PubMed/Medline, EMBASE, Web of Science, Ovid, Web of Knowledge, Cochrane Library, and CNKI between January 2012 and November 2020, retrieving at least 1500 spectra with strict criteria. This study will be carried out in accordance to Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines. We are going to summarize the test performance using random effects models.Results:Based on the pooled sensitivity, specificity, and diagnostic accuracy, we intend to provide the relative diagnostic efficiency in ICC through RS.Conclusion:Through this systematic review and meta-analysis, we intend to provide the pooled sensitivity, specificity and diagnostic accuracy of RS in the diagnosis of suspected ICC. Other parameters like positive likelihood ratios (LR), negative LR, diagnostic odds ratio (DOR), and area under curve (AUC) of the summary receiver operating characteristics (SROC) curve will also be calculated and related figures will be drawn to help illustrate the efficacy of RS in the diagnosis of ICC. 相似文献
74.
75.
Zongzhang Huang Qigu Yao Jianping Zhu Ying He Yanghao Chen Feng Wu Teng Hua 《Diagnostic and interventional imaging》2021,102(5):279-285
PurposeThe purpose of this study was to make a systematic review and meta-analysis to determine the stent diameter (8 mm vs. 10 mm) that conveys better safety and clinical efficacy for transjugular intrahepatic portosystemic shunt (TIPS).Materials and methodsFour databases were used to identify clinical trials published from inception until March 2020. Data were extracted to estimate and compare one-year and three-year overall survivals, hepatic encephalopathy, variceal rebleeding, and shunt dysfunction rates between patients with 8 mm covered stents and those with 10 mm covered stents.ResultsFive eligible studies were selected, which included 489 patients (316 men, 173 women). The 8 mm covered stent group had higher efficacy regarding one-year or three-year overall survival (odds ratio [OR], 2.88; P = 0.003) and (OR, 1.81; P = 0.04) and lower hepatic encephalopathy (OR, 0.69; P = 0.04) compared with 10 mm covered stent group. There were no significant differences in variceal rebleeding rate (OR 0.80; P = 0.67). However, shunt dysfunction was lower in 10 mm covered stent group (OR, 2.26; P = 0.003).ConclusionsOur results suggest that the use of 8 mm covered stents should be preferred to that of 10 mm covered stents for TIPS placement when portal pressure is frequently monitored. 相似文献
76.
Yuxiang Ma Wenfeng Fang Hongyun Zhao Sai Praneeth Bathena Amol Tendolkar Jennifer Sheng Li Zhang 《The oncologist》2021,26(4):e549-e566
Lessons Learned
- The overall safety profiles of ipilimumab 3 mg/kg and 10 mg/kg administered every 3 weeks, were consistent between Chinese patients with solid tumors in the current study and patients from previous U.S. ipilimumab monotherapy studies. No new safety signals were identified.
- The mean systemic exposures to ipilimumab (assessed by first dose area under the curve during the dosing interval and maximum serum concentration) were numerically lower in the Chinese patient population than in U.S. patients for both 3 mg/kg and 10 mg/kg doses; however, the range of serum concentrations in the Chinese and U.S. populations overlapped (3 mg/kg and 10 mg/kg), suggesting that ipilimumab pharmacokinetics was ethnically insensitive in this study.
77.
78.
79.
《Trends in Cardiovascular Medicine》2022,32(4):221-225
Correctly diagnosing the cause of wide QRS tachycardias remain an area of difficulty for many clinicians. The authors provide a concise update to the different ECG algorithms that have been developed as well as caveats in their application. 相似文献
80.