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   16769篇
  免费   1081篇
  国内免费   98篇
耳鼻咽喉   220篇
儿科学   613篇
妇产科学   479篇
基础医学   2218篇
口腔科学   361篇
临床医学   1288篇
内科学   4123篇
皮肤病学   560篇
神经病学   1648篇
特种医学   542篇
外科学   2176篇
综合类   53篇
一般理论   5篇
预防医学   1110篇
眼科学   228篇
药学   1007篇
中国医学   56篇
肿瘤学   1261篇
  2023年   183篇
  2022年   194篇
  2021年   812篇
  2020年   394篇
  2019年   608篇
  2018年   736篇
  2017年   421篇
  2016年   443篇
  2015年   518篇
  2014年   678篇
  2013年   817篇
  2012年   991篇
  2011年   1016篇
  2010年   569篇
  2009年   557篇
  2008年   785篇
  2007年   834篇
  2006年   771篇
  2005年   746篇
  2004年   720篇
  2003年   709篇
  2002年   641篇
  2001年   435篇
  2000年   478篇
  1999年   391篇
  1998年   134篇
  1997年   98篇
  1996年   104篇
  1995年   84篇
  1994年   77篇
  1993年   65篇
  1992年   210篇
  1991年   170篇
  1990年   182篇
  1989年   165篇
  1988年   162篇
  1987年   142篇
  1986年   118篇
  1985年   101篇
  1984年   80篇
  1983年   52篇
  1982年   27篇
  1979年   56篇
  1978年   30篇
  1977年   29篇
  1976年   30篇
  1975年   41篇
  1974年   44篇
  1973年   25篇
  1972年   31篇
排序方式: 共有10000条查询结果,搜索用时 390 毫秒
1.
Breast pseudoaneurysms after a core needle biopsy are a rare complication with a low incidence. However, it is important to be aware of the possibility of complications that require treatment.  相似文献   
2.
ABSTRACT

Close observation of the interactions between a traumatised mother and her infant son provides information on the modes of transmission of psychic trauma in the mother–infant dyad. Following the presentation of a current literature review on the theme, the subject of “radioactive residue” and counter-transference in the transmission of psychic trauma from mother to infant will be illustrated through a clinical case study that focuses on a Haitian mother and her two-year-old infant son who has been referred to a “transitional care nursery” in urban Paris. The encounter with this mother–infant dyad is analysed through observing the quality of the interactions that take place between the mother and infant in order to determine how a particularly traumatic narrative impacts the mother–infant relationship, in addition to relations with the clinician. Mother and infant respond to one another through the emission and reception of “radioactive residues” as hypothesized by Gampel. This clinical case study shows that there is a need to consider transcultural factors and collective experience and history when analysing traumatic events. Additionally, the case study shows that counter-transference can be an effective clinical tool for gaining access to an infant's experience as the recipient of a traumatic narrative.  相似文献   
3.
4.
Colorectal cancer (CRC) screening programs help diagnose cancer precursors and early cancers and help reduce CRC mortality. However, currently recommended tests, the fecal immunochemical test (FIT) and colonoscopy, have low uptake. There is therefore a pressing need for screening strategies that are minimally invasive and consequently more acceptable to patients, most likely blood based, to increase early CRC identification. MicroRNAs (miRNAs) released from cancer cells are detectable in plasma in a remarkably stable form, making them ideal cancer biomarkers. Using plasma samples from FIT-positive (FIT+) subjects in an Italian CRC screening program, we aimed to identify plasma circulating miRNAs that detect early CRC. miRNAs were initially investigated by quantitative real-time PCR in plasma from 60 FIT+ subjects undergoing colonoscopy at Fondazione IRCCS Istituto Nazionale dei Tumori, then tested on an internal validation cohort (IVC, 201 cases) and finally in a large multicenter prospective series (external validation cohort [EVC], 1121 cases). For each endoscopic lesion (low-grade adenoma [LgA], high-grade adenoma [HgA], cancer lesion [CL]), specific signatures were identified in the IVC and confirmed on the EVC. A two-miRNA-based signature for CL and six-miRNA signatures for LgA and HgA were selected. In a multivariate analysis including sex and age at blood collection, the areas under the receiver operating characteristic curve (95% confidence interval) of the signatures were 0.644 (0.607–0.682), 0.670 (0.626–0.714) and 0.682 (0.580–0.785) for LgA, HgA and CL, respectively. A miRNA-based test could be introduced into the FIT+ workflow of CRC screening programs so as to schedule colonoscopies only for subjects likely to benefit most.  相似文献   
5.
6.
7.
8.
9.
10.
Familial Cancer - The risk of radiotherapy-induced malignancies (RIMs) is a concern when treating Li–Fraumeni syndrome (LFS) or Li–Fraumeni Like (LFL) patients. However, the type of...  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