全文获取类型
收费全文 | 1996797篇 |
免费 | 154246篇 |
国内免费 | 26134篇 |
专业分类
耳鼻咽喉 | 24524篇 |
儿科学 | 58839篇 |
妇产科学 | 50663篇 |
基础医学 | 278105篇 |
口腔科学 | 53885篇 |
临床医学 | 194947篇 |
内科学 | 378930篇 |
皮肤病学 | 41423篇 |
神经病学 | 148134篇 |
特种医学 | 75210篇 |
外国民族医学 | 455篇 |
外科学 | 287753篇 |
综合类 | 87737篇 |
现状与发展 | 80篇 |
一般理论 | 549篇 |
预防医学 | 142889篇 |
眼科学 | 49386篇 |
药学 | 154767篇 |
341篇 | |
中国医学 | 21707篇 |
肿瘤学 | 126853篇 |
出版年
2022年 | 18016篇 |
2021年 | 28698篇 |
2020年 | 19829篇 |
2019年 | 23984篇 |
2018年 | 30901篇 |
2017年 | 24765篇 |
2016年 | 25571篇 |
2015年 | 32838篇 |
2014年 | 43319篇 |
2013年 | 52600篇 |
2012年 | 74464篇 |
2011年 | 80088篇 |
2010年 | 48041篇 |
2009年 | 42419篇 |
2008年 | 67671篇 |
2007年 | 70878篇 |
2006年 | 71428篇 |
2005年 | 68638篇 |
2004年 | 60794篇 |
2003年 | 57356篇 |
2002年 | 54336篇 |
2001年 | 97736篇 |
2000年 | 100487篇 |
1999年 | 84788篇 |
1998年 | 24861篇 |
1997年 | 22533篇 |
1996年 | 21566篇 |
1995年 | 20502篇 |
1994年 | 18392篇 |
1993年 | 16056篇 |
1992年 | 59690篇 |
1991年 | 57219篇 |
1990年 | 54734篇 |
1989年 | 52255篇 |
1988年 | 47377篇 |
1987年 | 46000篇 |
1986年 | 43089篇 |
1985年 | 40658篇 |
1984年 | 29739篇 |
1983年 | 25176篇 |
1982年 | 14070篇 |
1979年 | 25677篇 |
1978年 | 17626篇 |
1977年 | 14969篇 |
1976年 | 13920篇 |
1975年 | 14603篇 |
1974年 | 17707篇 |
1973年 | 17006篇 |
1972年 | 15731篇 |
1971年 | 14492篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Molnár B. Aroca S. Dobos A. Orbán K. Szabó J. Windisch P. Stähli A. Sculean A. 《Clinical oral investigations》2022,26(12):7135-7142
Clinical Oral Investigations - To evaluate t he long-term outcomes following treatment of RT 1 multiple adjacent gingival recessions (MAGR) using the modified coronally advanced tunnel (MCAT) with... 相似文献
2.
3.
Kienbaum Peter Schaefer Maximilian S. Weibel Stephanie Schlesinger Tobias Meybohm Patrick Eberhart Leopold H. Kranke Peter 《Der Anaesthesist》2022,71(2):123-128
Die Anaesthesiologie - Auch wenn für Anästhesiologen über Jahrzehnte die Prophylaxe und Therapie postoperativer Schmerzen im Rahmen des postoperativen Patientenkomforts an vorderster... 相似文献
4.
5.
6.
Wuteng Cao Huabin Hu Jiao Li Qianyu Wu Lishuo Shi Biao Li Jie Zhou Xinhua Wang Junhong Chen Chao Wang Huaiming Wang Weihao Deng Yan Huang Yanhong Deng 《International journal of cancer. Journal international du cancer》2023,153(11):1894-1903
Neoadjuvant programmed cell death protein 1 (PD-1) blockade exhibits promising efficacy in patients with mismatch repair deficient (dMMR) colorectal cancer (CRC). However, discrepancies between radiological and histological findings have been reported in the PICC phase II trial (NCT 03926338). Therefore, we strived to discern radiological features associated with pathological complete response (pCR) based on computed tomography (CT) images. Data were obtained from the PICC trial that included 36 tumors from 34 locally advanced dMMR CRC patients, who received neoadjuvant PD-1 blockade for 3 months. Among the 36 tumors, 28 (77.8%) tumors achieved pCR. There were no statistically significant differences in tumor longitudinal diameter, the percentage change in tumor longitudinal diameter from baseline, primary tumor sidedness, clinical stage, extramural venous invasion status, intratumoral calcification, peritumoral fat infiltration, intestinal fistula and tumor necrosis between the pCR and non-pCR tumors. Otherwise, tumors with pCR had smaller posttreatment tumor maximum thickness (median: 10 mm vs 13 mm, P = .004) and higher percentage decrease in tumor maximum thickness from baseline (52.9% vs 21.6%, P = .005) compared to non-pCR tumors. Additionally, a higher proportion of the absence of vascular sign (P = .003, odds ratio [OR] = 25.870 [95% CI, 1.357-493.110]), nodular sign (P < .001, OR = 189.000 [95% CI, 10.464-3413.803]) and extramural enhancement sign (P = .003, OR = 21.667 [2.848-164.830]) was observed in tumors with pCR. In conclusion, these CT-defined radiological features may have the potential to serve as valuable tools for clinicians in identifying patients who have achieved pCR after neoadjuvant PD-1 blockade, particularly in individuals who are willing to adopt a watch-and-wait strategy. 相似文献
7.
8.
Karl Johnson Katherine W. Saylor Isabella Guynn Karen Hicklin Jonathan S. Berg Kristen Hassmiller Lich 《Genetics in medicine》2022,24(2):262-288
PurposeUnderstanding the value of genetic screening and testing for monogenic disorders requires high-quality, methodologically robust economic evaluations. This systematic review sought to assess the methodological quality among such studies and examined opportunities for improvement.MethodsWe searched PubMed, Cochrane, Embase, and Web of Science for economic evaluations of genetic screening/testing (2013-2019). Methodological rigor and adherence to best practices were systematically assessed using the British Medical Journal checklist.ResultsAcross the 47 identified studies, there were substantial variations in modeling approaches, reporting detail, and sophistication. Models ranged from simple decision trees to individual-level microsimulations that compared between 2 and >20 alternative interventions. Many studies failed to report sufficient detail to enable replication or did not justify modeling assumptions, especially for costing methods and utility values. Meta-analyses, systematic reviews, or calibration were rarely used to derive parameter estimates. Nearly all studies conducted some sensitivity analysis, and more sophisticated studies implemented probabilistic sensitivity/uncertainty analysis, threshold analysis, and value of information analysis.ConclusionWe describe a heterogeneous body of work and present recommendations and exemplar studies across the methodological domains of (1) perspective, scope, and parameter selection; (2) use of uncertainty/sensitivity analyses; and (3) reporting transparency for improvement in the economic evaluation of genetic screening/testing. 相似文献
9.
目的探讨脊髓小脑共济失调2型(SCA2)致病基因ATXN2异常等位基因中间重复个体的表型和分子遗传学特点。方法针对2005—2018年中日友好医院神经科运动障碍与神经遗传病研究中心收集的1383个常染色体显性遗传共济失调家系的先证者和部分家系成员,采用荧光标记毛细管电泳片段分析方法进行动态突变检测,对携带ATXN2基因中间重复的个体进行临床表型和遗传特征分析。结果共检出163个家系(包含先证者和家系成员共203人)携带异常扩展的ATXN2基因CAG重复序列,其中93个家系中有107例的异常扩展等位基因重复次数在29~34次之间。在其中的20个亲子对中,父系遗传16个,异常等位基因的代间扩展增加0~28次,母系遗传4个,异常等位基因的代间扩展增加0~4次。结论对于临床拟诊SCA2家系患者,需对其亲代或成年子代个体进行ATXN2基因检测,以免漏诊。动态突变基因检测有助于识别中间重复的个体,对明确家系致病基因和遗传咨询至关重要。 相似文献
10.