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   1074381篇
  免费   73193篇
  国内免费   1364篇
耳鼻咽喉   15021篇
儿科学   34620篇
妇产科学   28661篇
基础医学   153515篇
口腔科学   29575篇
临床医学   94979篇
内科学   203880篇
皮肤病学   24396篇
神经病学   81515篇
特种医学   42981篇
外国民族医学   201篇
外科学   163267篇
综合类   21706篇
现状与发展   1篇
一般理论   263篇
预防医学   74632篇
眼科学   24537篇
药学   86220篇
  7篇
中国医学   2807篇
肿瘤学   66154篇
  2019年   7768篇
  2018年   11307篇
  2017年   8914篇
  2016年   10113篇
  2015年   11283篇
  2014年   15287篇
  2013年   22230篇
  2012年   30594篇
  2011年   32341篇
  2010年   18980篇
  2009年   17836篇
  2008年   30002篇
  2007年   32123篇
  2006年   32752篇
  2005年   31078篇
  2004年   29773篇
  2003年   28593篇
  2002年   27569篇
  2001年   60038篇
  2000年   61499篇
  1999年   50962篇
  1998年   12456篇
  1997年   11006篇
  1996年   11028篇
  1995年   10332篇
  1994年   9347篇
  1993年   8870篇
  1992年   37811篇
  1991年   36294篇
  1990年   35760篇
  1989年   34293篇
  1988年   30876篇
  1987年   29998篇
  1986年   28227篇
  1985年   26461篇
  1984年   19193篇
  1983年   16123篇
  1982年   8828篇
  1979年   17038篇
  1978年   11409篇
  1977年   10232篇
  1976年   8841篇
  1975年   10073篇
  1974年   11655篇
  1973年   11278篇
  1972年   10759篇
  1971年   10099篇
  1970年   9262篇
  1969年   8946篇
  1968年   7923篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Colorectal cancer (CRC) is the third most diagnosed cancer and the second leading cause of cancer-related mortality in the United States. Across the globe, people in the age group older than 50 are at a higher risk of CRC. Genetic and environmental risk factors play a significant role in the development of CRC. If detected early, CRC is preventable and treatable. Currently, available screening methods and therapies for CRC treatment reduce the incidence rate among the population, but the micrometastasis of cancer may lead to recurrence. Therefore, the challenge is to develop an alternative therapy to overcome this complication. Nanotechnology plays a vital role in cancer treatment and offers targeted chemotherapies directly and selectively to cancer cells, with enhanced therapeutic efficacy. Additionally, nanotechnology elevates the chances of patient survival in comparison to traditional chemotherapies. The potential of nanoparticles includes that they may be used simultaneously for diagnosis and treatment. These exciting properties of nanoparticles have enticed researchers worldwide to unveil their use in early CRC detection and as effective treatment. This review discusses contemporary methods of CRC screening and therapies for CRC treatment, while the primary focus is on the theranostic approach of nanotechnology in CRC treatment and its prospects. In addition, this review aims to provide knowledge on the advancement of nanotechnology in CRC and as a starting point for researchers to think about new therapeutic approaches using nanotechnology.  相似文献   
12.
Maternal and Child Health Journal - Early life exposures can have an impact on a child’s developmental trajectory and children born late preterm (34–36 weeks gestational age)...  相似文献   
13.
ABSTRACT

Objective: Dry eye is reported to be associated with several neurological diseases. The aim of this study is to evaluate the patients with hemiplegia after stroke for dry eye and compare their results with a control group.

Materials and methods: Forty-five patients with hemiplegia and 45 individuals as the control group were included in the study. Tear function tests (Schirmer and tear breakup time) and a dry eye questionnaire for dry eye symptoms (ocular surface disease index) were performed and the results of the two groups were compared.

Results: Schirmer test results were significantly lower in the post-stroke hemiplegia group compared to the control group (11.3 ± 8.2 mm and 20.6 ± 11.6 mm, respectively, p < .001). Tear breakup time results were significantly lower in the post-stroke hemiplegia group compared to the control group (7.9 ± 3.1 s and 12.1 ± 4.3 s, respectively, p < .001). Ocular surface disease index scores were not significantly different between hemiplegia and control groups (21.6 ± 20.0 and 19.8 ± 13.9, respectively, p = .635). Schirmer scores lower than 10 mm (60% and 30%, p < .001) and tear breakup time results lower than 10 s (65.6% and 28.9%, p < .001) were also higher in the hemiplegia group compared to control group.

Conclusion: We found lower Schirmer test and tear breakup time results and similar OSDI scores in hemiplegia patients compared to controls. Hemiplegia patients may have dry eye without typical symptoms. This should be taken into consideration in the follow-up and rehabilitation of post-stroke hemiplegia patients.  相似文献   
14.
15.
16.
17.
18.
19.
20.
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