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   8849篇
  免费   714篇
  国内免费   48篇
耳鼻咽喉   52篇
儿科学   226篇
妇产科学   118篇
基础医学   1568篇
口腔科学   75篇
临床医学   979篇
内科学   1882篇
皮肤病学   113篇
神经病学   846篇
特种医学   372篇
外科学   1385篇
综合类   95篇
一般理论   1篇
预防医学   669篇
眼科学   144篇
药学   556篇
中国医学   17篇
肿瘤学   513篇
  2021年   88篇
  2020年   92篇
  2019年   167篇
  2018年   162篇
  2017年   129篇
  2016年   142篇
  2015年   183篇
  2014年   228篇
  2013年   359篇
  2012年   468篇
  2011年   547篇
  2010年   347篇
  2009年   315篇
  2008年   538篇
  2007年   533篇
  2006年   528篇
  2005年   619篇
  2004年   607篇
  2003年   715篇
  2002年   676篇
  2001年   80篇
  2000年   52篇
  1999年   89篇
  1998年   145篇
  1997年   110篇
  1996年   90篇
  1995年   97篇
  1994年   107篇
  1993年   71篇
  1992年   63篇
  1991年   64篇
  1990年   62篇
  1989年   54篇
  1988年   59篇
  1987年   52篇
  1986年   56篇
  1985年   52篇
  1984年   62篇
  1983年   58篇
  1982年   69篇
  1981年   66篇
  1980年   58篇
  1979年   37篇
  1978年   41篇
  1977年   41篇
  1976年   41篇
  1975年   30篇
  1974年   43篇
  1973年   25篇
  1972年   27篇
排序方式: 共有9611条查询结果,搜索用时 78 毫秒
1.

Chronic granulomatous disease (CGD) is an inherited immunodeficiency due to defective leukocyte NADPH responsible for recurrent infections and aberrant inflammation. Mutations in the CYBB gene are responsible for the X-linked CGD and account for approximately 70% of the cases. CGD is diagnosed during childhood in males. Female carriers may have biased X-inactivation and may present with clinical manifestations depending on the level of residual NADPH oxidase activity. We report the case of a previously asymptomatic female carrier who was diagnosed at age 67 with a skin infection with the rare fungus Paecilomyces lilacinus as the first manifestation of CGD. Dihydrorhodamine 123 (DHR) activity was below 10%. Next-generation sequencing (NGS) revealed mutations in DNMT3A, ASXL1, and STAG2 suggesting that clonal hematopoiesis could be responsible for a progressive loss of NADPH oxidase activity and the late onset of X-linked CGD in this patient. Long-term follow-up of asymptomatic carrier women seems to be essential after 50 years old.

  相似文献   
2.

Purpose

To compare automated measurements of maximal diameter (Dmax) of abdominal aortic aneurysm (AAA) orthogonal to luminal or outer wall envelope centerline for endovascular repair (EVAR) follow-up.

Material and Methods

Eighty-three consecutive patients with AAA treated by EVAR who had at least 1 computed tomography (CT) scan before and 2 CT scans after EVAR with at least 5 months’ interval were included. Three-dimensional reconstruction of the AAA was achieved with dedicated segmentation software. Performances of automated calculation algorithms of Dmax perpendicular to lumen or outer wall envelope centerlines were then compared to manual measurement of Dmax on double-oblique multiplanar reconstruction (gold standard). Accuracy of automated Dmax measurements at baseline, follow-up, and progression over time was evaluated by calculation of mean error, Bland-Altman plot, and regression models.

Results

Disagreement in Dmax measurements between outer wall envelope algorithm and manual method was insignificant (mean error: baseline, -0.07 ± 1.66 mm, P = .7; first follow-up, 0.24 ± 1.69 mm, P = .2; last follow-up, -0.41 ± 2.74 mm, P = .17); whereas significant discrepancies were found between the luminal algorithm and the manual method (mean error: baseline, -1.24 ± 2.01 mm, P < .01; first follow-up, -1.49 ± 3.30 mm, P < .01; last follow-up, -1.78 ± 3.60 mm, P < .01). Dmax progression results were more accurate with AAA outer wall envelope algorithm compared to luminal method (P = .2).

Conclusions

AAA outer wall envelope segmentation is recommended to enable automated calculation of Dmax perpendicular to its centerline during EVAR follow-up.  相似文献   
3.
4.
5.
6.
7.
8.
Provoked vestibulodynia (PVD) is a prevalent women’s sexual pain disorder, which is associated with sexual function difficulties. Attachment theory has been used to understand adult sexual outcomes, providing a useful framework for examining sexual adaptation in couples confronted with PVD. Research to date indicates that anxious and avoidant attachment dimensions correlate with worse sexual outcomes in community and clinical samples. The present study examined the association between attachment, pain, sexual function, and sexual satisfaction in a sample of 101 couples in which the women presented with PVD. The actor–partner interdependence model was used in order to investigate both actor and partner effects. This study also examined the role of sexual assertiveness as a mediator of these associations via structural equation modeling. Women completed measures of pain intensity and both members of the couple completed measures of romantic attachment, sexual assertiveness, sexual function, and satisfaction. Results indicated that attachment dimensions did not predict pain intensity. Both anxious and avoidant attachment were associated with lower sexual satisfaction. Only attachment avoidance predicted lower sexual function in women. Partner effects indicated that higher sexual assertiveness in women predicted higher sexual satisfaction in men. Finally, women’s sexual assertiveness was found to be a significant mediator of the relationship between their attachment dimensions, sexual function, and satisfaction. Findings highlight the importance of examining how anxious and avoidant attachment may lead to difficulties in sexual assertiveness and to less satisfying sexual interactions in couples where women suffer from PVD.  相似文献   
9.
10.
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