首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   67943篇
  免费   6686篇
  国内免费   4120篇
耳鼻咽喉   213篇
儿科学   1650篇
妇产科学   383篇
基础医学   4162篇
口腔科学   115篇
临床医学   7194篇
内科学   23530篇
皮肤病学   331篇
神经病学   439篇
特种医学   3350篇
外国民族医学   18篇
外科学   8922篇
综合类   11547篇
现状与发展   20篇
预防医学   2336篇
眼科学   152篇
药学   5855篇
  30篇
中国医学   4392篇
肿瘤学   4110篇
  2024年   190篇
  2023年   1459篇
  2022年   2282篇
  2021年   3041篇
  2020年   3033篇
  2019年   2684篇
  2018年   2498篇
  2017年   2786篇
  2016年   3216篇
  2015年   2938篇
  2014年   4702篇
  2013年   4671篇
  2012年   3866篇
  2011年   4352篇
  2010年   3356篇
  2009年   3320篇
  2008年   3329篇
  2007年   3364篇
  2006年   3349篇
  2005年   2771篇
  2004年   2222篇
  2003年   1919篇
  2002年   1698篇
  2001年   1540篇
  2000年   1255篇
  1999年   1050篇
  1998年   1027篇
  1997年   874篇
  1996年   783篇
  1995年   651篇
  1994年   637篇
  1993年   514篇
  1992年   458篇
  1991年   387篇
  1990年   325篇
  1989年   294篇
  1988年   249篇
  1987年   202篇
  1986年   175篇
  1985年   195篇
  1984年   168篇
  1983年   109篇
  1982年   136篇
  1981年   115篇
  1980年   98篇
  1979年   87篇
  1978年   82篇
  1977年   69篇
  1976年   88篇
  1975年   34篇
排序方式: 共有10000条查询结果,搜索用时 171 毫秒
51.
Renal Denervation for Treatment of Cardiac Arrhythmias . It has now been more than a quarter of a century since modulation of the sympathetic nervous system was proposed for the treatment of cardiac arrhythmias of different origins. But it has also been some time since some of the early surgical attempts have been abandoned. With the development of ablation techniques, however, new approaches and targets have been recently introduced that have revolutionized our way of thinking about sympathetic modulation. Renal nerve ablation technology is now being successfully used for the treatment of resistant hypertension, but the indication spectrum might broaden and new therapeutic options might arise in the near future. This review focuses on the possible impact of renal sympathetic system modulation on cardiac arrhythmias, the current evidence supporting this approach, and the ongoing trials of this method in electrophysiological laboratories. We will discuss the potential roles that sympathetic modulation may play in the future.  相似文献   
52.
Diabetes mellitus(DM) negatively affects the development and progression of chronic liver diseases(CLD) of various etiologies. Concurrent DM and CLD are also associated with worse clinical outcomes with respect to mortality, the occurrence of hepatic decompensation, and the development of hepatocellular carcinoma(HCC). Unfortunately, early diagnosis and optimal treatment of DM can be challenging, due to the lack of established clinical guidelines as well as the medical complexity of this patient population. We conducted an exploratory review of relevant literature to provide an up-to-date review for internists and hepatologists caring for this patient population. We reviewed the epidemiological and pathophysiological associations between DM and CLD, the impact of insulin resistance on the progression and manifestations of CLD, the pathogenesis of hepatogenic diabetes, as well as the practical challenges in diagnosis and monitoring of DM in this patient population. We also reviewed the latest clinical evidence on various pharmacological antihyperglycemic therapies with an emphasis on liver disease-related clinical outcomes. Finally, we proposed an algorithm for managing DM in patients with CLD and discussed the clinical and research questions that remain to be addressed.  相似文献   
53.
肝内胆管癌(ICC)恶性程度高,症状隐匿,早期症状不明显,由于缺乏有效的筛查,确诊时多处于进展期,大多失去手术切除机会。目前,根治性手术仍是惟一可以使病人获得长期生存的治疗方式,但存在切除率低、术后易复发等难题。新辅助治疗能缩小原有病灶及转移的淋巴结,提高R0切除率,对于无法切除的局部晚期ICC,新辅助治疗可使局部进展的ICC降期为可切除,也可改善肝移植病人的预后。但目前对ICC行新辅助治疗的潜在效用仍存在争议。  相似文献   
54.
55.
56.
57.
《中国现代医生》2020,58(14):5-8
目的研究经导管动脉化疗栓塞(TACE)对原发性肝癌患者的疗效及中性粒细胞/淋巴细胞计数比(NLR)、血小板/淋巴细胞计数比(PLR)的影响。方法选择2015年6月~2019年1月我院接诊的原发性肝癌患者80例作为研究对象,采用随机数表法将患者分为两组,每组各40例。对照组予传统肝切除术治疗,观察组采用TACE治疗。对比两组治疗后的临床效果,NLR、PLR、癌胚抗原(CEA)、可溶性B7-H4、可溶性白细胞介素-2受体(sIL-2R)及并发症发生情况。结果治疗后,两组患者的总有效率分别为75.00%和52.50%,观察组高于对照组,差异有统计学意义(P0.05);治疗前,两组患者NLR、PLR水平对比,差异无统计学意义(P0.05);治疗后,患者NLR、PLR水平下降,观察组低于对照组,差异有统计学意义(P0.05);治疗前,两组患者CEA、B7-H4、sIL-2R水平对比,差异无统计学意义(P0.05);治疗后,两组患者CEA、B7-H4、sIL-2R水平下降,观察组低于对照组,差异有统计学意义(P0.05);两组患者并发症发生率分别为17.50%、40.00%,观察组低于对照组,差异有统计学意义(P0.05)。结论在原发性肝癌患者中使用TACE效果显著,可有效改善患者肿瘤标志物水平,减少并发症,值得推广应用。  相似文献   
58.
《中国现代医生》2020,58(19):119-122+封三
目的 探讨实时超声引导微波消融术治疗子宫腺肌瘤的临床应用。方法 选取2015年1月~2019年1月收入我院子宫腺肌瘤患者37例为研究对象。采用超声造影评价患者的腺肌瘤消融率,常规超声评价瘤体缩小率。采用临床疗效评定标准来评价患者临床症状改善情况。结果 痛经改善率为78.9%(15/19),月经失调改善率为42.9%(9/21),贫血改善率为55.6%(10/18)。超声造影显示仅3例出现消融不完全,消融有效率为91.9%,术后行补充消融治疗,37例局限性子宫腺肌瘤平均消融率均达90%以上。与治疗前比较,治疗后3、6、12个月患者瘤体缩小率分别为60.8%、78.1%、93.1%,差异有统计学意义(P0.05)。与治疗前比较,治疗后临床症状有改善。结论实时超声引导微波消融术治疗子宫腺肌瘤患者,能够减小腺肌瘤体积,且能够明显改善患者临床症状,为子宫肌瘤患者提供新的治疗手段。  相似文献   
59.
《Annals of hepatology》2019,18(3):514-516
Gyromitra esculenta, also known as “false morel” is one of the most poisonous mushrooms. This species is found all over the world, growing in coniferous forest in early spring time. Common manifestation of poisoning includes gastrointestinal symptoms which include varied degrees of liver impairment.We describe three cases: acute liver injury, acute liver failure and acute-on-chronic liver failure due to G. esculenta poisoning. At admission patients presented with encephalopathy and features of liver failure. Two of them recovered completely following supportive management while the remaining patient who also had preexisting liver disease developed multiorgan failure and subsequently died.Although a rare occurrence, G. esculenta poisoning should be considered in the differential diagnosis of acute liver failure.  相似文献   
60.
ObjectiveClinical outcomes of 500 high-intensity focused ultrasound (HIFU)-treated uterine fibroids and adenomyosis are analyzed and presented.Materials and methodsThis is a retrospective cross-sectional analysis from a single tertiary medical center. From April 2015 to October 2018, 546 cases were enrolled for the study. After excluding 46 patients with less than 3 months of follow-up period, there were 404 fibroids, 149 adenomyosis and 53 mixed conditions entered for analysis. The patients’ uterine fibroids and adenomyosis were treated by HIFU according to Chongqing Haifu protocol, with 12 cm diameter transducer of focal length 10–16  cm at 0.8 or 1.6 MHz T2-weight MRI imaging was rendered prior to and 3 month post treatment to assess lesion volume change using non-perfusion volume, which was the primary outcome. Secondary outcomes including quality of life, subjective satisfaction, adverse events and pregnancy rate were determined using self-reported questionnaires. The mean follow up period ranged from 3 to 38 months with an average of 21 months.ResultsThree months after HIFU-treated uterine fibroids and adenomyosis, the lesion size reduced 40.2% and 46.3%, respectively. Symptoms all improved with better quality of life for the fibroid group, while those with adenomyosis or combined diseases benefit the most from pain control. Serum CA125 decreased significantly for all studied groups, and LDH only showed improvement for fibroids group. Number of adverse events is comparable to Chongqing data (approximately 10.2%), with mostly mild and self-resolving conditions. No permanent sequelae or death was documented. Twelve pregnancies are reported in this cohort.ConclusionHIFU is safe and effective in treating uterine fibroids and adenomyosis. The results are reproducible if standardized treatment schedules are followed. It is a promising treatment alternative with the advantages of precision, non-invasiveness, rapid recovery and readiness for pregnancy.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号