全文获取类型
收费全文 | 14618篇 |
免费 | 1343篇 |
国内免费 | 1175篇 |
专业分类
耳鼻咽喉 | 124篇 |
儿科学 | 158篇 |
妇产科学 | 162篇 |
基础医学 | 1694篇 |
口腔科学 | 189篇 |
临床医学 | 1967篇 |
内科学 | 2063篇 |
皮肤病学 | 104篇 |
神经病学 | 778篇 |
特种医学 | 462篇 |
外国民族医学 | 10篇 |
外科学 | 1510篇 |
综合类 | 3050篇 |
现状与发展 | 6篇 |
一般理论 | 1篇 |
预防医学 | 886篇 |
眼科学 | 328篇 |
药学 | 1627篇 |
15篇 | |
中国医学 | 877篇 |
肿瘤学 | 1125篇 |
出版年
2024年 | 46篇 |
2023年 | 242篇 |
2022年 | 551篇 |
2021年 | 792篇 |
2020年 | 610篇 |
2019年 | 470篇 |
2018年 | 462篇 |
2017年 | 435篇 |
2016年 | 457篇 |
2015年 | 660篇 |
2014年 | 828篇 |
2013年 | 737篇 |
2012年 | 1115篇 |
2011年 | 1207篇 |
2010年 | 851篇 |
2009年 | 668篇 |
2008年 | 800篇 |
2007年 | 864篇 |
2006年 | 801篇 |
2005年 | 779篇 |
2004年 | 487篇 |
2003年 | 450篇 |
2002年 | 396篇 |
2001年 | 394篇 |
2000年 | 328篇 |
1999年 | 339篇 |
1998年 | 197篇 |
1997年 | 212篇 |
1996年 | 166篇 |
1995年 | 141篇 |
1994年 | 109篇 |
1993年 | 63篇 |
1992年 | 81篇 |
1991年 | 78篇 |
1990年 | 79篇 |
1989年 | 61篇 |
1988年 | 48篇 |
1987年 | 38篇 |
1986年 | 44篇 |
1985年 | 20篇 |
1984年 | 11篇 |
1983年 | 7篇 |
1982年 | 6篇 |
1981年 | 2篇 |
1979年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
Rui Zhang Jin Chen Yanqin Xiong Lihong Wang Xinmei Huang Tiange Sun Bingbing Zha Yueyue Wu Cuili Yan Shufei Zang Qin Zhou Zhe Huang Jun Liu 《Journal of Diabetes》2022,14(7):442
BackgroundThis study aims to investigate the potential association of peripheral inflammatory blood cell parameters with the incidence and progression of chronic kidney disease (CKD) in patients with diabetes.MethodsThe cross‐sectional study included 1192 subjects with diabetes derived from one center. The cohort study included 2060 subjects with diabetes derived from another two centers followed up for 4 years. Logistic regression and Cox proportional hazards models were used to evaluate the association of peripheral inflammatory blood cell with CKD.ResultsIn the cross‐sectional study, neutrophil count performed best as an independent risk factor for CKD (odds ratio 2.556 [95% confidence interval 1.111, 5.879]) even after 1:1 case–control matching for age, gender, history of high blood pressure and duration of diabetes. Spline regression revealed a significant linear association of CKD incidence with continuous neutrophil count in excess of 3.6 × 109/L. In the cohort study, subjects were grouped based on tertile of neutrophil count and neutrophil‐to‐lymphocyte ratio. Cox regression analysis results showed that only neutrophil count was independently associated with CKD progression (the highest group vs. the lowest group, hazard ratio 2.293 [95% confidence interval 1.260, 4.171]) after fully adjusting for potential confounders. The cumulative incidence of CKD progression in patients with diabetes gradually increased with increasing neutrophil count (53 (7.7%) subjects in the lowest group vs. 60 (8.2%) in the middle group vs. 78 (12.2%) in the highest group).ConclusionsThis study suggested that neutrophil count is an independent risk factor for progression of CKD in patients with diabetes. 相似文献
62.
63.
目的 分析胰岛素对急性缺血性脑卒中合并糖尿病患者神经功能产生的影响效果。方法 将2016年10月至2017年10月我院接诊的急性缺血性脑卒中合并糖尿病患者中抽取84例纳入研究,常规组采用常规方法治疗,联合组采用常规西医联合胰岛素进行治疗。评价两组患者不同治疗后临床疗效、神经功能改善情况的差异性。结果 治疗后,联合组临床治疗有效率为92.86%,明显高于常规组(P<0.05);联合组神经功能缺损NIHSS评分(5.34±0.11)分,明显低于常规组(P<0.05)。结论 胰岛素对急性缺血性脑卒中合并糖尿病患者神经功能产生的影响效果显著,可推广应用。 相似文献
64.
目的 研究无高血压性嗜铬细胞瘤临床病理特点,为其防治提供理论依据.方法 随机选取132例散发性单侧肾上腺嗜铬细胞瘤(PHEO),分为2组A组即嗜铬细胞瘤合并高血压(HPs)90例,B组即无高血压性嗜铬细胞瘤(NPs)42例,原发性高血压(PH)98例作为参照组即C组.比较分析A、B及C组3组患者临床表现及病理特点.结果 A、B、C 3组在性别、年龄及身高上差异均无统计学意义(P>0.05);SBP和DBP3组相比,C组最高,A组第二,B组最低.B组的三联征发生率明显低于A组,差异有统计学意义(P=0.021);A组眩晕、持续高血压及阵发性高血压发生率均比B组高,差异均有统计学意义(P=0.002,P=0.001,P=0.002).A、B两组CT特征比较差异无统计学意义(P>0.05).根据苯乙醇胺-N-甲级转移酶(PNMT)免疫组化染色定性结果分为2个亚组,B组亚组肿瘤直径与PNMT表现呈负相关,而A组亚组则没有此情况.A、B两组在细胞低密度、儿茶酚胺肾上腺素型及儿茶酚胺去甲肾上腺素型方面差异有统计学意义(P=0.014,P=0.003,P=0.003),其它均无统计学意义(P>0.05).除VMAT1外,其它基因表达水平A组均高于B组,差异有统计学意义(P=0.039,P=0.041,P=0.035).结论 NPs和HPs的临床病理特点不同,主要与肿瘤发生及发展进程中儿茶酚胺途径的相关产物及催化酶的基因转录水平紧密关联. 相似文献
65.
ObjectivesThe objectives of this study were to evaluate the diagnostic value for ovarian cancer using proteomic pattern established by surface-enhanced laser desorption/ionization (SELDI-TOF-MS) profiling of plasma proteins coupled with support vector machine (SVM) data analysis, and to investigate whether the proteomic pattern established by advanced ovarian cancer could be used for diagnosis of early-stage ovarian cancer patients.MethodsThe study included 44 ovarian cancer patients (11 early-stage and 33 advanced ovarian cancer patients) and 31 age-matched non-cancer controls. SELDI-TOF-MS coupled with SVM analysis was performed to establish a proteomic pattern to discriminate 33 advanced ovarian cancer patients from 31 non-cancer controls. A blind test, including 11 early-stage ovarian cancer cases, was performed to investigate whether proteomic pattern established by advanced ovarian cancer could be used for diagnosis of early-stage ovarian cancer patients.ResultsA seven-peak proteomic pattern was established which discriminated 33 advanced ovarian cancer patients from 31 non-cancer controls effectively. A sensitivity of 93.94% (31/33) and a specificity of 93.55% (29/31) were yielded from the proteomic pattern. Among the 7 protein peaks, 5 with mass charge ratio (m/z) 4099 Da, 5488 Da, 4144 Da, 4479 Da and 3940 Da were up-regulated, while 2 peaks, with m/z 13 783 Da and 8588 Da were down-regulated in the advanced ovarian cancer group compared with non-cancer control group. After blind test, 9 of 11 early-stage ovarian cancer patients were successfully diagnosed with the accuracy of 81.82% (9/11).ConclusionsThis study demonstrated that SELDI-TOF-MS coupled with SVM is effective in distinguishing protein expression between ovarian cancer and non-cancer plasma and it may be feasible to diagnose early-stage ovarian cancer using proteomic pattern established by advanced ovarian cancer. The gained and lost protein peaks in plasma may exist in both early-stage and advanced ovarian cancer plasma. Further studies should be performed using larger sample numbers. 相似文献
66.
67.
68.
Xiong T Daniels J Middleton L Champaneria R Khan KS Gray R Johnson N Lichten EM Sutton C Jones KD Chen FP Vercellini P Aimi G Lui WM;International LUNA IPD Meta-analysis Collaborative Group 《BJOG : an international journal of obstetrics and gynaecology》2007,114(12):1580-e7
Background Currently, there are a number of clinical trials, but no international collaboration for collating research on effectiveness of laparoscopic uterosacral nerve ablation (LUNA) for alleviating chronic pelvic pain.
Objective Meta-analysis was used by collecting individual patient data (IPD) from the existing trials, to provide a comprehensive assessment of the effectiveness of LUNA that will be generalisable in various clinical contexts.
Methods IPD will be sought and collected from all relevant (both already finished and continuing) randomised trials identified through previous systematic reviews. After obtaining raw data and cleaning the database, analysis will be of all patients ever randomised based on the intention-to-treat principle using endpoints measured at 12 months following randomisation.
Proposal We will update searches, contact all authors, obtain data in whatever form it can be provided, build a single database, produce results for individual studies, have them verified by original authors, explore of any heterogeneity and reasons behind it and finally pool all raw data in to a meta-analysis using appropriate statistical methods. The project will test the effectiveness of LUNA for women with chronic pelvic pain. It will also motivate collaborating primary investigators to undertake new primary studies to corroborate or improve upon the conclusions derived from the retrospective analysis. 相似文献
Objective Meta-analysis was used by collecting individual patient data (IPD) from the existing trials, to provide a comprehensive assessment of the effectiveness of LUNA that will be generalisable in various clinical contexts.
Methods IPD will be sought and collected from all relevant (both already finished and continuing) randomised trials identified through previous systematic reviews. After obtaining raw data and cleaning the database, analysis will be of all patients ever randomised based on the intention-to-treat principle using endpoints measured at 12 months following randomisation.
Proposal We will update searches, contact all authors, obtain data in whatever form it can be provided, build a single database, produce results for individual studies, have them verified by original authors, explore of any heterogeneity and reasons behind it and finally pool all raw data in to a meta-analysis using appropriate statistical methods. The project will test the effectiveness of LUNA for women with chronic pelvic pain. It will also motivate collaborating primary investigators to undertake new primary studies to corroborate or improve upon the conclusions derived from the retrospective analysis. 相似文献
69.
目的:回顾性分析178例高血压脑出血术后脑缺血,脑水肿的相关因素及治疗方法.方法:随机将术后5~7 d后采用扩张血管降低血液粘滞度等药物的分为一组(治疗组)共108例.另一组为术后一直未用扩管药物的病例70例(对照组).并就两组病人的术后,功能康复的等级(ADL)及住院日等进行分析.结果:术后使用扩管药物组的ADL预后分级明显好于对照组,其住院日也明显缩短.结论:高血压脑出血术后5~7 d采用扩张血管改善微循环药物,其愈后明显优于不用扩管药物.故作者主张高血压脑出血术后5~7 d采用扩管及降低血液粘滞度药物,有利于脑功能的康复. 相似文献
70.
慢性乙型肝炎患者的HDV感染 总被引:1,自引:0,他引:1
作者对69例经病理确诊为慢性乙型肝炎患者,检测了肝内δ抗原(ABC免疫组化法)和血清δ抗体(ELISA法),结果57例肝组织有 7例检出δ抗原,39例血清中 7例检出δ抗体,无 1例 δ抗原和抗体同时阳性。HDV 标志的总检出率为20.3%(14/69)。CPH和CAH之间的HDVM检出率无显著性差异。HDV感染与无HDV感染者之间,HBV复制标志无差异。HDV 感染者蛋白质代谢紊乱程度较重。发现3例肝内δ抗原和血清HB-DNA均为阳性,显示重叠HDV感染,对HBV复制未见明显抑制。 相似文献