全文获取类型
收费全文 | 44899篇 |
免费 | 3470篇 |
国内免费 | 1035篇 |
专业分类
耳鼻咽喉 | 248篇 |
儿科学 | 903篇 |
妇产科学 | 1024篇 |
基础医学 | 2597篇 |
口腔科学 | 1549篇 |
临床医学 | 12032篇 |
内科学 | 3777篇 |
皮肤病学 | 220篇 |
神经病学 | 3976篇 |
特种医学 | 1490篇 |
外国民族医学 | 5篇 |
外科学 | 7225篇 |
综合类 | 4555篇 |
一般理论 | 4篇 |
预防医学 | 2291篇 |
眼科学 | 273篇 |
药学 | 3741篇 |
67篇 | |
中国医学 | 2213篇 |
肿瘤学 | 1214篇 |
出版年
2024年 | 133篇 |
2023年 | 1014篇 |
2022年 | 1571篇 |
2021年 | 2168篇 |
2020年 | 2172篇 |
2019年 | 2148篇 |
2018年 | 1974篇 |
2017年 | 1941篇 |
2016年 | 1782篇 |
2015年 | 1713篇 |
2014年 | 3441篇 |
2013年 | 3975篇 |
2012年 | 2430篇 |
2011年 | 2748篇 |
2010年 | 2183篇 |
2009年 | 1985篇 |
2008年 | 2201篇 |
2007年 | 1902篇 |
2006年 | 1698篇 |
2005年 | 1393篇 |
2004年 | 1184篇 |
2003年 | 1009篇 |
2002年 | 891篇 |
2001年 | 773篇 |
2000年 | 597篇 |
1999年 | 561篇 |
1998年 | 475篇 |
1997年 | 439篇 |
1996年 | 359篇 |
1995年 | 312篇 |
1994年 | 275篇 |
1993年 | 224篇 |
1992年 | 232篇 |
1991年 | 189篇 |
1990年 | 126篇 |
1989年 | 147篇 |
1988年 | 110篇 |
1987年 | 120篇 |
1986年 | 119篇 |
1985年 | 126篇 |
1984年 | 123篇 |
1983年 | 76篇 |
1982年 | 106篇 |
1981年 | 67篇 |
1980年 | 52篇 |
1979年 | 34篇 |
1978年 | 20篇 |
1977年 | 24篇 |
1976年 | 27篇 |
1975年 | 16篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
目的:分析抑郁症与不明原因胸痛间的关联性及其可能机制,为临床疾病的治疗提供参考依据。方法:纳入2012年6月至2014年5月四川省南充精神卫生中心精神科收治的不明原因胸痛患者35例,作为观察组,另选取35例来院进行常规体检的健康志愿者作为对照组,比较两组的抑郁量表评分、抑郁症发生率、血清C反应蛋白(CRP)、白细胞介素6(IL-6)、五羟色胺(5-HT)及外周血中的CD4+、CD8+含量。结果:与对照组比较,观察组的CRP、IL-6、5-HT、CD4+均低于对照组;且观察组的CD8+、抑郁症发生率(31.43%)、轻中度抑郁及重度抑郁患者比例均高于对照组水平,组间对比差异显著(P<0.05)。结论:抑郁症与不明原因胸痛存在一定相关性,推断可能与CRP、5-HT、IL-6等细胞因子有关,也可能与免疫抑制过程有关,在临床诊治中需引起重视。 相似文献
12.
13.
Interstitial cystitis/bladder pain syndrome (IC/BPS) and vulvodynia are chronic pain syndromes that appear to be intertwined from the perspectives of embryology, pathology and epidemiology. These associations may account for similar responses to various therapies. 相似文献
14.
Dan-Feng Xu Bing Wu Jin-Xin Wang Jian Yu Jian-Xin Xie 《World Journal of Clinical Cases》2021,9(5):1096-1102
BACKGROUNDGuillain-Barré syndrome (GBS) is a rare disorder that typically presents with ascending weakness, pain, paraesthesias, and numbness, which mimic the findings in lumbar spinal stenosis. Here, we report a case of severe lumbar spinal stenosis combined with GBS.CASE SUMMARYA 70-year-old man with a history of lumbar spinal stenosis presented to our emergency department with severe lower back pain and lower extremity numbness. Magnetic resonance imaging confirmed the diagnosis of severe lumbar spinal stenosis. However, his symptoms did not improve postoperatively and he developed dysphagia and upper extremity numbness. An electromyogram was performed. Based on his symptoms, physical examination, and electromyogram, he was diagnosed with GBS. After 5 d of intravenous immunoglobulin (0.4 g/kg/d for 5 d) therapy, he gained 4/5 of strength in his upper and lower extremities and denied paraesthesias. He had regained 5/5 of strength in his extremities when he was discharged and had no symptoms during follow-up.CONCLUSIONGBS should be considered in the differential diagnosis of spinal disorder, even though magnetic resonance imaging shows severe lumbar spinal stenosis. This case highlights the importance of a careful diagnosis when a patient has a history of a disease and comes to the hospital with the same or similar symptoms. 相似文献
15.
16.
《Clinical neurophysiology》2019,130(12):2231-2237
ObjectiveThe clinical and neurophysiological characteristics of myoclonus in Angelman syndrome (AS) have been evaluated in single case or small cohorts, with contrasting results. We evaluated the features of myoclonus in a wide cohort of AS patients.MethodsWe performed polygraphic EEG-EMG recording in 24 patients with genetically confirmed AS and myoclonus. Neurophysiological investigations included jerk-locked back-averaging (JLBA), cortico-muscular coherence (CMC) and generalised partial directed coherence (GPDC). CMC and GPDC analyses were compared to those obtained from 10 healthy controls (HC).ResultsTwenty-four patients (aged 3–35 years, median 20) were evaluated. Sequences of quasi-continuous rhythmic jerks mostly occurred at alpha frequency or just below (mean 8.4 ± 1.4 Hz), without EEG correlate. JLBA did not show any clear transient preceding the jerks. CMC showed bilateral over-threshold CMC in alpha band that was prominent on the contralateral hemisphere in the patient group as compared to HC group. GPDC showed a significantly higher alpha outflow from both hemispheres toward activated muscles in the patient group, and a significantly higher beta outflow from contralateral hemisphere in the HC group.ConclusionsThese neurophysiological findings suggest a subcortical generator of myoclonus in AS.SignificanceMyoclonus in AS has not a cortical origin as previously hypothesised. 相似文献
17.
《Seminars in Arthroplasty》2015,26(1):28-33
While use of large heads in total hip arthroplasty (THA) continues to grow, concerns have been raised regarding anterior hip pain resulting from impingement of the prosthetic head against soft-tissues like the iliopsoas. To address these concerns, a new anatomically contoured head (ACH) was developed. In this study cadaver tests were utilized to show that iliopsoas impingement/tenting caused by conventional heads is significantly relieved with the more rounded and reduced distal profile of the ACH. Thus, the ACH implant may be able to decrease the risk of soft-tissue impingement with conventional heads, particularly in the smaller hip. 相似文献
18.
目的分析早发型子痫前期应用低分子肝素期待治疗的临床效果。方法回顾分析2017-01—2018-12间在郑州大学第一附属医院产科终止妊娠的95例早发型子痫前期患者的临床资料。按终止妊娠前是否应用低分子肝素分为2组。对照组(47例)给予降压、解痉等治疗;观察组(48例)在对照组基础上加用低分子肝素。结果2组分娩孕周、妊娠延长时间、妊娠并发症发生率、新生儿出生体质量、新生儿窒息及胎儿宫内窘迫发生率、新生儿Apgar评分等,差异均无统计学意义(P>0.05)。结论对早发型子痫前期患者在常规治疗基础上短期应用低分子肝素,不能延长妊娠时间,不改善母婴结局。 相似文献
19.
20.