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   25137篇
  免费   2872篇
  国内免费   223篇
耳鼻咽喉   590篇
儿科学   963篇
妇产科学   527篇
基础医学   1355篇
口腔科学   57篇
临床医学   3175篇
内科学   1823篇
皮肤病学   185篇
神经病学   275篇
特种医学   1034篇
外科学   8281篇
综合类   3108篇
预防医学   1455篇
眼科学   19篇
药学   1617篇
  10篇
中国医学   460篇
肿瘤学   3298篇
  2024年   72篇
  2023年   329篇
  2022年   704篇
  2021年   840篇
  2020年   713篇
  2019年   673篇
  2018年   859篇
  2017年   797篇
  2016年   976篇
  2015年   1000篇
  2014年   1691篇
  2013年   1491篇
  2012年   1698篇
  2011年   1887篇
  2010年   1521篇
  2009年   1525篇
  2008年   1377篇
  2007年   1463篇
  2006年   1270篇
  2005年   1014篇
  2004年   878篇
  2003年   714篇
  2002年   618篇
  2001年   523篇
  2000年   510篇
  1999年   415篇
  1998年   354篇
  1997年   281篇
  1996年   221篇
  1995年   225篇
  1994年   187篇
  1993年   134篇
  1992年   133篇
  1991年   106篇
  1990年   120篇
  1989年   88篇
  1988年   102篇
  1987年   90篇
  1986年   59篇
  1985年   71篇
  1984年   61篇
  1983年   26篇
  1982年   57篇
  1981年   55篇
  1980年   44篇
  1979年   53篇
  1978年   61篇
  1977年   32篇
  1976年   31篇
  1973年   20篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
目的总结用人工合成材料的吊带经不同的途径治疗女性压力性尿失禁的方法和结果。方法采用人工合成材料的吊带经耻骨固定(In—Fast)技术治疗3例,用经腹壁固定(TVT和IVS)技术治疗13例。结果绝大多数病人均排尿通畅.无尿失禁复发。但TVT组有1例排尿不畅,3个月后剪断吊带后变为轻度尿失禁。In-fast组有1例性交不适伴阴道分泌物增加。结论用人工合成材料的吊带进行悬吊技术治疗女性真性压力性尿失禁是安全、微创和有效的手术方式。经耻骨固定技术和用经腹壁固定技术这两种方法各有自己的优缺点。应根据病人的具体情况去选择使用。  相似文献   
62.
邓小莹 《临床医学工程》2009,16(12):154-155
排尿障碍是脑卒中患者的常见症状,严重影响患者的生活质量,分析排尿障碍与脑卒中的关系对指导脑卒中治疗具有重要意义。本文通过查阅大量国内外文献,综合论述近年有关脑卒中与排尿障碍的研究及其进展。  相似文献   
63.
正位可控性去带盲结肠膀胱术的疗效观察   总被引:4,自引:1,他引:3  
目的:探讨正位可控性去带盲结肠膀胱术的临床疗效.方法:对17例膀胱肿瘤患者行膀胱全切除术后,应用末段回肠及盲升结肠作贮尿囊行正位膀胱重建术.结果:17例中15例获随访6~24个月,平均14.5个月.全组无严重并发症,均无瘤生存;术后3周自主可控性排尿,日间排尿可控率为93.3%,1年夜间尿失禁22.2%.术后6个月尿动力学检查,膀胱容量336 ml、最大尿流率13.7 ml/s、剩余尿量42 ml,而充盈期膀胱压力明显低于尿道闭合压.输尿管反流1例,但无尿道、输尿管狭窄,肾功能正常.结论:正位可控性去带盲结肠膀胱术具有膀胱容量大、内压低,正位排尿,可控性好,且手术操作简单、并发症少等优点,患者易于接受,是一种较理想的尿流改道方式.  相似文献   
64.
A review of liver sonograms obtained for cancer patients (excluding primary liver cancers) over a 12 year period found 829 benign lesions: non-parasitic cysts (427 cases), hemangiomas (216 cases), solitary calcifications (79 cases), focal fatty infiltration (62 cases), and miscellaneous lesions (45 cases). These benign pathologies represented 41.8% of the focal hepatic lesions observed during this period in this population; hepatic metastases accounted for the remaining 58.2%. Marked female predilection was noted for the nonparasitic cysts, hemangiomas, and focal fatty infiltration; 63–78.7% of these lesions were solitary, and first-line imaging by US was sufficient for diagnosis of 66.1–98.2% of cases. Analysis of lesion evolution over more than 5 years revealed modifications in 17% of hemangiomas, 23.9% of nonparasitic cysts, and 75% of cases of focal fatty infiltration. Systematic pretherapy liver sonography can be proposed owing to the high frequency of benign liver lesions that can create diagnostic problems during follow-up of cancer patients. Correspondence to: J. N. Bruneton  相似文献   
65.
  Variability in the interpretation of micturating cystourethrography by paediatric radiologists for the diagnosis of vesicoureteric reflux in children was evaluated. All 265 micturating cystourethrograms (MCUs) that were available from 304 consecutive children aged 0.5 – 61 months  –  who were investigated after their first urine infection between 1993 and 1995 as part of a prospective cohort study  –  were selected for interpretation. Three experienced paediatric radiologists from the same department independently interpreted the MCUs according to the grading system of the International Reflux Study in Children, from grades 0 to V, with the presence of intrarenal reflux also noted. Apart from being informed that urine infection was the indication for the MCU, no other clinical information was given to the radiologists. The indices of variability used were the percentage of agreement and the kappa statistic, expressed as a percentage. Both measures were weighted with integers representing the number of categories from perfect agreement. Disagreement was analysed for children and kidneys. For the diagnosis of vesicoureteric reflux in individual patients, including grade, the percentage of agreement was 96% – 97% (kappa 90% – 91%) and the weighted percentage of agreement was 96% – 98% (weighted kappa 93% – 94%). The same high level of agreement was present for individual kidneys, with a percentage of agreement of 97% – 98% (kappa 89% – 92%) and a weighted percentage of agreement of 98% – 99% (kappa 94% – 95%). There was near perfect agreement in the interpretation of radiological micturating cystourethrography among three experienced paediatric radiologists for the diagnosis and grade of vesicoureteric reflux. Any variations in the medical care of children suspected of having vesicoureteric reflux are not explained by differences in the reporting of this diagnostic test. Received June 19, 1996; received in revised form November 1, 1996; accepted December 6, 1996  相似文献   
66.
BTA在膀胱癌诊断中的应用   总被引:2,自引:1,他引:1  
为了探求对膀胱肿瘤诊断及术后复发监测的理想手段,从1995年9月~1996年6月,采用BTA试剂检测方法对202例血尿患者及71例膀胱肿瘤术后的患者进行了诊断检测,诊断膀胱癌的敏感度为96%、特异度为83%、准确度为86%,26例膀胱肿瘤患者中仅6例(23%)尿脱落细胞阳性,正常对照均为阴性。认为BTA试剂是一种快速、有效、无创性诊断膀胱肿瘤的方法。  相似文献   
67.
膀胱憩室的手术治疗   总被引:1,自引:0,他引:1  
作者总结31例膀胱憩室的手术治疗结果,并介绍一种处理巨大膀胱憩室的简易手术。多数憩室继发于膀胱流出道梗阻。憩室内并发肿瘤7例,结石形成9例。膀胱憩室多由膀胱造影或B超诊断。憩室切除常采用膀胱内外联合入路。本组26例手术同时处理膀胱出口梗阻和膀胱憩室。获得随访的23例中,21例尿路症状消失。7例憩室肿瘤患者中,5例在两年半内死亡,余2例分别存活2年和6年。本组2例巨大膀胱憩室行经膀胱内憩室旷置术,无并发症,膀胱造影无异常。作者认为,膀胱憩室的治疗应依据每个患者的情况而选用不同的手术方式。对位于膀胱后下方,粘连广泛的巨大憩室,宜采用经膀胱内入路憩室旷置术。  相似文献   
68.
The purpose of this study was to assess the feasibility of imaging of bladder cancer with fluorine-18 fluorodeoxyglucose positron emission tomography (FDG-PET) scanning. We studied 12 patients with histologically proven bladder cancer who had undergone surgical procedures and/or radiotherapy. Retrograde irrigation of the urinary bladder with 1000–3710 ml saline was performed during nine of the studies. Dynamic and static PET images were obtained, and standardized uptake value images were reconstructed. FDG-PET scanning was true-positive in eight patients (66.7%), but false-negative in four (33.3%). Of 20 organs with tumor mass lesions confirmed pathologically or clinically, 16 (80%) were detected by FDG-PET scanning. FDG-PET scanning detected all of 17 distant metastatic lesions and two of three proven regional lymph node metastases. FDG-PET was also capable of differentiating viable recurrent bladder cancer from radiation-induced alterations in two patients. In conclusion, these preliminary data indicate the feasibility of FDG-PET imaging in patients with bladder cancer, although a major remaining pitfall is intense FDG accumulation in the urine. Present address: Department of Radiology, National Defense Medical College, 3-2 Namiki, Tokorozawa 359, Japan  相似文献   
69.
BCG对膀胱粘膜结构的影响及肿瘤超微病理的研究   总被引:3,自引:0,他引:3  
应用光镜,透射电镜与扫描电镜技术对20例浅表膀胱肿瘤BCG治疗前后粘膜结构,肿瘤超微结构及Hela细胞表面结构的影响作了比较研究。结果表明,BCG灌注后,膀胱粘膜的结构发生了明显的改变,粘膜层次变薄,粘膜下可见大量单个核细胞浸润,肉芽肿与非干酷淋巴细胞团形成。  相似文献   
70.
目的 探讨经尿道膀胱肿瘤低功率电切术的适应症、手术方法及其疗效评估. 方法分析65例经尿道膀胱肿瘤切除术.手术时间10~90 min,平均时间41 min;膀胱穿孔1例,术后冲洗时间1~3 d,平均2 d;导尿管留置时间1~5 d,平均4 d.结果 随访0.5~3 a,48例中肿瘤复发15例,其中原位复发2例,异位多位复发13例.结论 经尿道膀胱肿瘤低功率电切可防止并明显减少闭孔神经反射的发生,具有操作简单,损伤小,出血少、恢复快等优点.  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