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   13819篇
  免费   1420篇
  国内免费   244篇
耳鼻咽喉   78篇
儿科学   167篇
妇产科学   98篇
基础医学   556篇
口腔科学   380篇
临床医学   4525篇
内科学   1541篇
皮肤病学   369篇
神经病学   702篇
特种医学   257篇
外科学   1523篇
综合类   1820篇
现状与发展   1篇
一般理论   1篇
预防医学   1670篇
眼科学   76篇
药学   657篇
  56篇
中国医学   434篇
肿瘤学   572篇
  2024年   24篇
  2023年   547篇
  2022年   1417篇
  2021年   2053篇
  2020年   1094篇
  2019年   884篇
  2018年   546篇
  2017年   717篇
  2016年   562篇
  2015年   351篇
  2014年   568篇
  2013年   700篇
  2012年   496篇
  2011年   537篇
  2010年   473篇
  2009年   410篇
  2008年   470篇
  2007年   503篇
  2006年   458篇
  2005年   319篇
  2004年   292篇
  2003年   301篇
  2002年   233篇
  2001年   177篇
  2000年   133篇
  1999年   110篇
  1998年   119篇
  1997年   109篇
  1996年   80篇
  1995年   53篇
  1994年   61篇
  1993年   60篇
  1992年   67篇
  1991年   75篇
  1990年   93篇
  1989年   80篇
  1988年   106篇
  1987年   83篇
  1986年   40篇
  1985年   15篇
  1984年   16篇
  1983年   13篇
  1982年   2篇
  1981年   11篇
  1980年   6篇
  1979年   5篇
  1978年   4篇
  1977年   2篇
  1975年   5篇
  1969年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
解磷注射液救治急性有机磷农药中毒34例临床报告   总被引:1,自引:0,他引:1  
将急性有机磷农药中毒患者69例随机分为2组,一组主要应用解磷注射液治疗(新疗法34例),另一组(35例)主要应用阿托品治疗。两组治愈率分别为97.1%及77.1%,疗效比较差异显著(P<0.05)。新疗法的优点是起效快,作用持久,疗程短(两组比较P<0.001),副反应轻,值得推广应用。并就应用方法及注意事项等作了探讨,也强调了早期足量用药的重要性。  相似文献   
42.
A forty year old female patient developed paraesthesia of the right side of her lower lip following the placement of an extensive pin-retained amalgam restoration in her lower right second premolar tooth. Radiographs indicated that the mental foramen was close to the apex of this tooth and it was assumed that postoperative pulpitis and periapical inflammation had caused the paraesthesia through the effects of pressure on the mental nerve. The paraesthesia resolved following endodontic treatment of the lower second premolar tooth and the patient has had no further signs or symtoms.  相似文献   
43.
44.
采用窥视下尿道内切开术治疗尿道狭窄或闭锁53例,其中48例治疗成功。狭窄闭锁段≤3cm者,单纯冷刀切开即可;>3cm者,冷刀切开后需加电刀切除疤痕组织,扩大尿道,尿道内皮管植入。36例患者术后随访1~8年(平均4年6个月),27例排尿通畅,尿流率和性功能正常。本文就操作要点和并发症防治等进行了详细讨论。  相似文献   
45.
POEMS syndrome is a multisystem disorder associated with plasmacell dyscrasias. This report describes a patient with POEMS-associatedrenal disease and reviews the literature on biopsy-proven renalinvolvement in POEMS syndrome. Our patient had glomerulonephritiswith membranoproliferative features on light-microscopy withoutcharacteristic findings on immunofluorescence, and with ultra-structural evidence of glomerular microangiopathy. Ultrastructuralevidence of microangiopathy was also found in vasa nervorum.In 20 other cases of POEMS- associated renal disease, 16 hadglomerular disease. Light-microscopy showed membranoproliferative-likeglomerulopathy in 14 patients and glomerular microan giopathyin two. Ultrastructural evidence of microangi opathy was presentin all 15 patients in whom electron- microscopy was done. Thus,in most patients with POEMS-associated glomerular disease acharacteristic lesion is present with evidence of endothelialinjury. As endothelial damage is also found in endoneural vessels,generalized endothelial injury may play a role in non-renalmanifestations of POEMS syndrome. In previous reviews manifestationsof the POEMS syndrome were similar for patients with or withoutmyeloma. Among patients with biopsy-proven glomerular disease,however, myeloma patients are underrepres ented. Whether thisrepresents a sampling error or has true pathophysiological significanceremains to be established.  相似文献   
46.
OBJECTIVE: To assess the safety and acceptability of vaginal hysterectomy with and without simultaneous oophorectomy in a 24-hour day case surgery setting for women with nonprolapse indications for surgery. DESIGN: Prospective observational study. SETTING: A busy teaching hospital and tertiary referral centre for Obstetrics and Gynaecology. POPULATION: Seventy-one women from one consultant's practice underwent a vaginal hysterectomy with a planned discharge within 24 hours after the procedure. All women had a body mass index less than 40 and a suitable home environment for routine day case surgery, other than that the women were from an unselected population. METHOD: Prospective observational study. MAIN OUTCOME MEASURES: The duration of the operation and mean blood loss were recorded. Any intraoperative complications were noted. In addition, the proportion of women discharged home within 24 hours of the operation was recorded together with any readmissions to hospital. Returns to theatres and any postoperative complications were also recorded. Postoperative pain scores were assessed 6 and 24 hours after procedure in selected women. RESULTS: Seventy-one vaginal hysterectomies were performed as 24-hour day case procedures. The intraoperative complication rate was 1.4%. Sixty-five women were discharged home within 24 hours (91.5%). The readmission rate within this group was 6.2%. The duration of the procedure, mean blood loss, return to theatre rate and incidence of febrile illness were comparable with rates recorded in inpatient studies. CONCLUSIONS: Vaginal hysterectomy performed as a 24-hour day case procedure appears to be as safe as traditional inpatient management, with a high rate of early discharge and a low rate of readmission. This may have additional advantages for the woman and healthcare provider alike.  相似文献   
47.
目的 :测量在 4个区分别拔除 1个前磨牙后的 Bolton指数全牙比。方法 :选取 5 8例拔除 4个前磨牙正畸治疗后的满意病例 ,测量模型的牙齿宽度 ,计算其 Bolton指数全牙比。结果 :拔除 4个前磨牙正畸满意病例的 Bolton指数全牙比为 90 .5 0 %± 1 .60 %。结论 :本文测得的拔除 4个前磨牙的病例治疗后的 Bolton指数全牙比对临床具有一定参考意义。  相似文献   
48.
报告120例羊膜腔穿刺羊水细胞培养结果:在成功的99例中,发现二例染色体异常,核型为47,xy,+18和46,xx/47,xx,+F,在21例失败中出现一例眼球畸形。培养成功率为82.5%;染色体异常检出率为2.02%。无一例因羊膜腔穿刺而导致流产,但出现一例轻度羊水栓塞合并症。并对羊水细胞培养在产前宫内诊断中应用价值及术后并发症进行了讨论。  相似文献   
49.
S. H. CRAY MB  BS  FRCA    J.L. DIXON MB  BS  FRCA    C.M.B. HEARD MB  BS  FRCA  D.S. SELSBY MB  BS  FRCA 《Paediatric anaesthesia》1996,6(4):265-270
Forty-nine children having day-stay surgical procedures were randomly assigned to receive oral midazolam 0.75 mg·kg?1 or placebo in a double blind fashion. The child's level of anxiety was assessed before premedication using parental, child and observer scales. The child and observer anxiety scores were repeated in the anaesthetic room. Most children presented for anaesthesia in a calm state, irrespective of whether they had received midazolam. Parents tended to overestimate their child's level of anxiety. Observer anxiety scores reliably predicted behaviour during induction of anaesthesia in the absence of a sedative. Observer scores decreased in the midazolam group (P<0.02), but not in the placebo group, children below six years having the greatest decrease with midazolam. The median time to discharge from hospital was delayed by 30 min in the midazolam group (P<0.01). Children do not require routine sedative premedication for day case procedures, but oral midazolam is useful in producing calm behaviour in those children with high observer anxiety scores.  相似文献   
50.
报告本院1981年1月至1985年12月,住院分娩4588例中产后并发症341例,发病率为7.43%。其中,产后出血1189例,占4.12%;分娩损伤71例,占1.55%;其它产后病81例,占1.76%。妊娠41—42周并发症发生率为11.14%;超过42周高达15.56%。分娩方式以剖腹产术后并发症最多,占12.48%,提示应对手术中无菌操作与环境,以及分娩后处理应予以足够重视。  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