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   627篇
  免费   26篇
  国内免费   21篇
儿科学   21篇
妇产科学   8篇
基础医学   40篇
口腔科学   5篇
临床医学   51篇
内科学   109篇
皮肤病学   8篇
神经病学   20篇
特种医学   141篇
外科学   82篇
综合类   45篇
预防医学   33篇
眼科学   13篇
药学   40篇
中国医学   1篇
肿瘤学   57篇
  2021年   3篇
  2020年   3篇
  2019年   5篇
  2018年   6篇
  2017年   4篇
  2016年   2篇
  2015年   4篇
  2014年   6篇
  2013年   9篇
  2012年   11篇
  2011年   16篇
  2010年   20篇
  2009年   19篇
  2008年   15篇
  2007年   13篇
  2006年   23篇
  2005年   15篇
  2004年   9篇
  2003年   17篇
  2002年   18篇
  2001年   18篇
  2000年   12篇
  1999年   16篇
  1998年   27篇
  1997年   45篇
  1996年   31篇
  1995年   32篇
  1994年   29篇
  1993年   21篇
  1992年   12篇
  1991年   23篇
  1990年   18篇
  1989年   33篇
  1988年   18篇
  1987年   22篇
  1986年   12篇
  1985年   19篇
  1984年   6篇
  1983年   11篇
  1982年   9篇
  1981年   11篇
  1980年   6篇
  1979年   3篇
  1978年   6篇
  1977年   5篇
  1976年   2篇
  1975年   4篇
  1970年   1篇
  1969年   1篇
  1968年   1篇
排序方式: 共有674条查询结果,搜索用时 15 毫秒
1.
2.
采用综合治疗,抗炎,散瞳,局部治疗与全身应用免疫抑制疗法,治疗319例352眼外伤获得了满意的疗效,眼球挫伤104例,眼球穿孔伤93例,化学烧伤71例,眼炸伤46例。眼热烧伤5例,治疗包括及时清创胶粘或缝合,清除前房出血合理用皮质类固醇和免疫抑制剂等。眼球挫伤治愈率97.12%,穿透伤93.18%,热烧伤66.67%。319例眼外伤治愈率94.67%好转5.33%,并对各种治疗方法进行了讨论。  相似文献   
3.
This review addresses means for the improvement of treatment results in small cell and non-small cell lung cancer. In small cell lung cancer prognostic factors such as the distinction between classic and variant type in vivo remain an important subject for further investigations. Data concerning the schedule dependency of etoposide will lead to the investigation of new treatment regimens. The effect of warfarin is intriguing and warrants further research. Investigations of the damaging effects of prophylactic brain irradiation versus the effect on survival should be awaited before the role of prophylactic brain irradiation can be defined. The role of radiotherapy in the improvement of survival of limited-disease patients remains controversial. In non-small cell lung cancer the role of both radiotherapy and chemotherapy is still a matter of a seemingly never-ending debate. A major problem is the selection of patients. Therefore only randomized phase III trials should be performed in carefully defined subgroups of patients, based upon stage, performance status, and presence or absence of symptoms.  相似文献   
4.
5.
Sarcoid-like lymphadenopathy mimicking metastatic testicular cancer   总被引:1,自引:0,他引:1  
A case of nonseminomatous testicular cancer and enlarged mediastinal lymph nodes, which were interpreted as metastases, is reported. When there was no change after two courses of chemotherapy, a mediastinoscopy was performed and the results showed sarcoidosis.  相似文献   
6.
Retrorenal colon: implications for percutaneous diskectomy   总被引:1,自引:0,他引:1  
Helms  CA; Munk  PL; Witt  WS; Davis  GW; Morris  J; Onik  G 《Radiology》1989,171(3):864-865
It has been recommended that computed tomography (CT) with the patient prone be performed in every patient undergoing percutaneous diskectomy; this would enable detection of a retrorenal location of the colon, which could interfere with the percutaneous procedure. In this evaluation of 346 prone CT studies, only one patient (0.29%) was found to have retrorenal or retropsoas bowel that would have been perforated at diskectomy. Because of this extremely low prevalence, the performance of prone CT in every patient undergoing percutaneous lumbar diskectomy is not believed to be necessary.  相似文献   
7.
Abdominal abnormalities in AIDS: detection at US in a large population   总被引:1,自引:0,他引:1  
  相似文献   
8.
A pediatric cardiac case of transient obstruction of the superior vena cava by the venous cannula before cardiopulmonary bypass is presented. With venous obstruction and increase in central venous pressure, reduced cerebral blood flow velocities and absence of diastolic Doppler flow were detected. This was followed by regional cerebral venous oxygen desaturation and global electroencephalographic slowing. Reposition of the venous cannula led to the recovery of these physiologic indicators and a noncomplicated clinical outcome.  相似文献   
9.
Background: Spherophakia is an uncommon diagnosis. This is the first case report of spherophakia evaluated by ultrasound biomicroscopy.
Methods: Ultrasound biomicroscopy is a new diagnostic technique developed by one of the authors and provides images with microscopic resolution of the anterior segment. A patient with spherophakia was evaluated by ultrasound biomicroscopy (Zeiss-Humphrey, 50MHz) before and after YAG laser iridotomy.
Results: Ultrasound biomicroscopic assessment revealed a shallow anterior chamber, a very steep anterior lens curvature, iridolenticular contact, elongated zonules, and an increased distance between the lens equator and the ciliary processes. Angle closure glaucoma was due to a pupil block mechanism. The pupil block was relieved by YAG laser iridotomy.
Conclusions: Ultrasound biomicroscopy is a useful technique to confirm the diagnosis of spherophakia. The pupil block in spherophakia is relieved by YAG laser iridotomy.  相似文献   
10.
AIM:To determine if novel bile acid transporters may be expressed in human tissues.METHODS:SLC10A1 (NTCP) was used as a probe to search the NCBI database for homology to previously uncharacterized ESTs. The homology search identified an EST (termed SLC10A4) that shares sequence identity with SLC10A1 and SLC10A2 (ASBT). We performed Northern blot analysis and RT-PCR to determine the tissue distribution of SLC10A4. SLC10A4 was cloned in frame with an epitope tag and overexpressed in CHO cells to determine cellular localization and functional analysis of bile acid uptake.RESULTS:Northern analysis revealed that SLC 10A4 mRNA is ubiquitously expressed fn human tissues with the highest levels of mRNA expression in brain,placenta, and liver. In SLC10A4-transfected CHO cells,immunoblotting analysis and immunofluorescence staining demonstrated a 49-kDa protein that is expressed at the plasma membrane and intracellular compartments.Functional analysis of SLC10A4 showed no significant taurocholate uptake in the presence of sodium when compared to untransfected CHO cells.CONCLUSION:To date, we have shown that this protein has no capacity to transport taurocholate relative to SLC1041; however, given its ubiquitous tissue distribution, it may play a more active role in transporting other endogenous organic anions.  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