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   864222篇
  免费   71798篇
  国内免费   1837篇
耳鼻咽喉   12823篇
儿科学   24691篇
妇产科学   25182篇
基础医学   124508篇
口腔科学   25513篇
临床医学   75581篇
内科学   165433篇
皮肤病学   16999篇
神经病学   70251篇
特种医学   35300篇
外国民族医学   171篇
外科学   136545篇
综合类   24670篇
现状与发展   2篇
一般理论   268篇
预防医学   67111篇
眼科学   20536篇
药学   64861篇
中国医学   1594篇
肿瘤学   45818篇
  2018年   7393篇
  2015年   7789篇
  2014年   11184篇
  2013年   16888篇
  2012年   22880篇
  2011年   23995篇
  2010年   13954篇
  2009年   13156篇
  2008年   22724篇
  2007年   24821篇
  2006年   24687篇
  2005年   24288篇
  2004年   23893篇
  2003年   23018篇
  2002年   22070篇
  2001年   35900篇
  2000年   36528篇
  1999年   30957篇
  1998年   9245篇
  1997年   8566篇
  1996年   8499篇
  1995年   8026篇
  1994年   7742篇
  1992年   26696篇
  1991年   26137篇
  1990年   25660篇
  1989年   24728篇
  1988年   23254篇
  1987年   22921篇
  1986年   21784篇
  1985年   21124篇
  1984年   16413篇
  1983年   14016篇
  1982年   8878篇
  1981年   8221篇
  1980年   7693篇
  1979年   16757篇
  1978年   12129篇
  1977年   10205篇
  1976年   9342篇
  1975年   10159篇
  1974年   12657篇
  1973年   12155篇
  1972年   11553篇
  1971年   10708篇
  1970年   10241篇
  1969年   9922篇
  1968年   8910篇
  1967年   8240篇
  1966年   7667篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
104.
105.
106.
Objectives: There is a paucity of reporting on surgical outcomes of isolated posterior cruciate ligament reconstruction (PCLR). We hypothesize that isolated PCL injuries failing nonoperative treatment achieve good outcomes and are able to return to sport following PCLR.

Methods: A retrospective analysis was performed to identify patients with isolated PCL injuries that underwent reconstruction between 2001 and 2014. Patients with multi-ligamentous injury or another concomitant knee pathology were excluded. Medical records were reviewed for demographic, clinical and operative data. Patients were contacted for administration of a telephone-based questionnaire which included the International Knee Documentation Committee (IKDC) Subjective Knee Evaluation form, Lysholm-Tegner scales, Marx activity scale (MAS), return to sport status, and patient satisfaction instruments.

Results: A total of 15 isolated PCL reconstructions in 14 patients with a mean age of 27.5 years (range 17–43) met the study inclusion criteria; mean follow up was 6.3 years (range 1.4–15.2). Pre-operatively, the primary complaint was knee instability in all patients; on physical examination, lack of a firm end point during posterior drawer testing was found in 93% (14/15) of the knees. In total, 12 of 15 knees underwent transtibial, single-bundle PCLR and three of 15 underwent tibial inlay, double bundle PCLR. Graft types included: quadriceps autograft (7/15), Achilles allograft (6/15), and hamstring autograft (2/15). There were no graft failures in our patient cohort. At most recent follow up the mean scores respectively on the IKDC form, Lysholm-Tegner scales and MAS were (standard deviation): 77.3 (16.5), 83.1 (17.9), 6.13 (2.6), and 7.1 (6.0). All fourteen patients were athletes prior to their injury and 79% (11/14) returned to sport and overall patient satisfaction was 9.2/10.

Conclusions: Isolated PCLR provides good outcomes at mean medium-term follow up with restoration of function, high rate of return to sport and overall patient satisfaction.  相似文献   

107.
108.
Luckscheiter  A.  Lohs  T.  Fischer  M.  Zink  W. 《Der Anaesthesist》2020,69(3):170-182
Die Anaesthesiologie - Das Management des schwierigen Atemwegs ist eine präklinische Schlüsselqualifikation. Für Notärzte mit hohem Erfahrungsgrad im Atemwegsmanagement sind...  相似文献   
109.

Purpose

To evaluate the feasibility of a same-day yttrium-90 (90Y) radioembolization protocol with resin microspheres (including pretreatment angiography, lung shunt fraction [LSF] determination, and radioembolization) for the treatment of hepatocellular carcinoma (HCC) and liver metastases.

Materials and Methods

All same-day radioembolization procedures performed over 1 y (February 2017 to January 2018) were included in this single-institutional retrospective analysis, in which 34 procedures were performed in 26 patients (median age, 63 y; 13 women), 19 with liver metastases and 7 with HCC. Yttrium-90 treatment activities were calculated by body surface area method. Tumor imaging response was assessed by Response Evaluation Criteria In Solid Tumors (RECIST) 1.1 for liver metastases and modified RECIST for HCC. Clinical side effects and adverse events were graded per Common Terminology Criteria for Adverse Events version 4.0.

Results

All planned cases were technically successful, and no cases were canceled for elevated LSF or vascular anatomic reasons. Pretreatment angiography modified the planned 90Y treatment activity in 1 case in which vascular anatomy required a lobar-dose split into 2 for segmental infusions. In 18% of cases, patients were briefly admitted after the procedure for observation or symptom management. Imaging evaluation of initial efficacy at 1 month demonstrated partial response in 25% and stable disease in 67% of patients with liver metastases and partial/complete response in 43% and stable disease in 14% of patients with HCC. Grade ≥ 3 adverse events occurred in 6% of cases, with no systemic therapy–limiting toxicities. The mean total procedure time was 4.2 hours.

Conclusions

A same-day 90Y radioembolization protocol with resin microspheres is feasible in select patients, which can expedite cancer therapy.  相似文献   
110.
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