全文获取类型
收费全文 | 934087篇 |
免费 | 78839篇 |
国内免费 | 7407篇 |
专业分类
耳鼻咽喉 | 13345篇 |
儿科学 | 25423篇 |
妇产科学 | 25656篇 |
基础医学 | 131602篇 |
口腔科学 | 26677篇 |
临床医学 | 84521篇 |
内科学 | 173987篇 |
皮肤病学 | 17552篇 |
神经病学 | 73632篇 |
特种医学 | 38180篇 |
外国民族医学 | 210篇 |
外科学 | 143926篇 |
综合类 | 40153篇 |
现状与发展 | 16篇 |
一般理论 | 279篇 |
预防医学 | 72619篇 |
眼科学 | 22028篇 |
药学 | 72969篇 |
82篇 | |
中国医学 | 6601篇 |
肿瘤学 | 50875篇 |
出版年
2021年 | 8407篇 |
2018年 | 9678篇 |
2016年 | 8615篇 |
2015年 | 11183篇 |
2014年 | 15423篇 |
2013年 | 21066篇 |
2012年 | 29008篇 |
2011年 | 30869篇 |
2010年 | 18821篇 |
2009年 | 17233篇 |
2008年 | 27161篇 |
2007年 | 29148篇 |
2006年 | 28754篇 |
2005年 | 28042篇 |
2004年 | 26420篇 |
2003年 | 25237篇 |
2002年 | 23971篇 |
2001年 | 37374篇 |
2000年 | 37855篇 |
1999年 | 32003篇 |
1998年 | 9968篇 |
1997年 | 9269篇 |
1996年 | 9040篇 |
1995年 | 8517篇 |
1994年 | 8105篇 |
1992年 | 26883篇 |
1991年 | 26281篇 |
1990年 | 25800篇 |
1989年 | 24847篇 |
1988年 | 23345篇 |
1987年 | 22993篇 |
1986年 | 21828篇 |
1985年 | 21183篇 |
1984年 | 16428篇 |
1983年 | 14025篇 |
1982年 | 8879篇 |
1981年 | 8223篇 |
1979年 | 16749篇 |
1978年 | 12121篇 |
1977年 | 10183篇 |
1976年 | 9332篇 |
1975年 | 10148篇 |
1974年 | 12644篇 |
1973年 | 12139篇 |
1972年 | 11543篇 |
1971年 | 10689篇 |
1970年 | 10221篇 |
1969年 | 9909篇 |
1968年 | 8900篇 |
1967年 | 8232篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
目的观察关节镜下采用自体腘绳肌腱经胫骨隧道前交叉韧带(anterior cruciate ligament, ACL)双束八股解剖重建的临床效果。方法随访上海交通大学附属第六人民医院运动医学科2018年12月—2020年1月收治的103例ACL断裂患者资料,其中男78例,女25例,年龄18~45岁,平均(26.8±5.86)岁;左侧47例,右侧56例,均采用关节镜下自体腘绳肌腱经胫骨隧道打股骨骨隧道,ACL双束八股解剖重建。按照Lysholm评分、国际膝关节评分委员会(IKDC)膝关节评分、Tegner膝关节评分标准和膝关节自我效能量表K-SES评价疗效。结果所有患者术后获随访12~42个月,平均(24±8.18)个月;手术前、末次随访评分比较,Lysholm评分分别为(48.41±4.44)分和(95.34±1.91)分,2组比较差异有统计学意义(P<0.001);IKDC评分分别为(44.05±4.36)分和(95.66±1.89)分,2组比较差异有统计学意义(P<0.001);Tegner评分分别为(2.84±0.95)分和(6.15±0.89)分,2组比较差异有统计学意义(P<0.001);膝关节自我效能量表K-SES量表(3.10±0.83)分和(7.12±1.10)分,2组比较差异有统计学意义(P<0.001)。末次随访103例患者前抽屉试验阴性,轴移试验阴性。98例(95.1%)Lachman试验阴性,5例(4.9%)Lachman试验1°阳性。结论关节镜下采用自体腘绳肌腱经胫骨隧道双束八股解剖重建前交叉韧带是一种恢复膝关节稳定性,恢复伤前活动水平的有效方法。 相似文献
84.
85.
86.
W. Do T. Elzerman R. de Bree A. Rosenberg T. Forouzanfar E.M. Van Cann 《International journal of oral and maxillofacial surgery》2021,50(5):591-597
The aim of this study was to analyse the effect of body mass index (BMI), both low and high values, on the perioperative complication rate in patients with oral squamous cell carcinoma (OSCC). The medical records of 259 patients operated between 2014 and 2017 for OSCC were reviewed. Univariate and multivariate analyses were performed. Sixty of the 259 patients developed 87 complications. Low or high BMI was not associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade. Low BMI, American Society of Anesthesiologists score 2 and 3, a longer operating time, and increased blood loss were associated with a longer hospital stay. Low BMI was associated with a longer hospital stay. Neither low nor high BMI was associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade. 相似文献
87.
88.
89.
Michael W. Manning Yi-Ju Li Dean Linder John C. Haney Yi-Hung Wu Mihai V. Podgoreanu Madhav Swaminathan Jacob N. Schroder Carmelo A. Milano Ian J. Welsby Mark Stafford-Smith Kamrouz Ghadimi 《Journal of cardiothoracic and vascular anesthesia》2021,35(5):1310-1318
- Download : Download high-res image (215KB)
- Download : Download full-size image
90.
Erik de Bakker Mirthe A. M. van der Putten Martijn W. Heymans Sander W. Spiekstra Taco Waaijman Liselotte Butzelaar Vera L. Negenborn Vivian K. Beekman Erman O. Akpinar Thomas Rustemeyer Frank B. Niessen Susan Gibbs 《Experimental dermatology》2021,30(1):169-178
Unpredictable hypertrophic scarring (HS) occurs after approximately 35% of all surgical procedures and causes significant physical and psychological complaints. Parallel to the need to understanding the mechanisms underlying HS formation, a prognostic tool is needed. The objective was to determine whether (systemic) immunological differences exist between patients who develop HS and those who develop normotrophic scars (NS) and to assess whether those differences can be used to identify patients prone to developing HS. A prospective cohort study with NS and HS groups in which (a) cytokine release by peripheral blood mononuclear cells (PBMC) and (b) the irritation threshold (IT) after an irritant (sodium lauryl sulphate) patch test was evaluated. Univariate regression analysis of PBMC cytokine secretion showed that low MCP‐1, IL‐8, IL‐18 and IL‐23 levels have a strong correlation with HS (P < .010‐0.004; AUC = 0.790‐0.883). Notably, combinations of two or three cytokines (TNF‐a, MCP‐1 and IL‐23; AUC: 0.942, Nagelkerke R2: 0.727) showed an improved AUC indicating a better correlation with HS than single cytokine analysis. These combination models produce good prognostic results over a broad probability range (sensitivity: 93.8%, specificity 86.7%, accuracy 90,25% between probability 0.3 and 0.7). Furthermore, the HS group had a lower IT than the NS group and an accuracy of 68%. In conclusion, very fundamental immunological differences exist between individuals who develop HS and those who do not, whereas the cytokine assay forms the basis of a predictive prognostic test for HS formation, the less invasive, easily performed irritant skin patch test is more accessible for daily practice. 相似文献