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   1348篇
  免费   69篇
  国内免费   56篇
耳鼻咽喉   4篇
儿科学   79篇
妇产科学   9篇
基础医学   146篇
口腔科学   24篇
临床医学   177篇
内科学   302篇
皮肤病学   51篇
神经病学   63篇
特种医学   302篇
外科学   53篇
综合类   28篇
预防医学   68篇
眼科学   45篇
药学   62篇
中国医学   2篇
肿瘤学   58篇
  2023年   4篇
  2021年   13篇
  2020年   9篇
  2019年   10篇
  2018年   19篇
  2017年   4篇
  2016年   6篇
  2015年   16篇
  2014年   19篇
  2013年   54篇
  2012年   28篇
  2011年   26篇
  2010年   42篇
  2009年   62篇
  2008年   25篇
  2007年   65篇
  2006年   27篇
  2005年   34篇
  2004年   24篇
  2003年   26篇
  2002年   28篇
  2001年   22篇
  2000年   22篇
  1999年   27篇
  1998年   72篇
  1997年   82篇
  1996年   102篇
  1995年   62篇
  1994年   58篇
  1993年   53篇
  1992年   20篇
  1991年   17篇
  1990年   23篇
  1989年   39篇
  1988年   39篇
  1987年   37篇
  1986年   51篇
  1985年   49篇
  1984年   15篇
  1983年   16篇
  1982年   15篇
  1981年   10篇
  1980年   12篇
  1979年   9篇
  1978年   16篇
  1977年   12篇
  1976年   17篇
  1975年   15篇
  1974年   4篇
  1973年   5篇
排序方式: 共有1473条查询结果,搜索用时 31 毫秒
1.
2.
3.
With their unique perspectives in the identification, design, promotion, and evaluation of cancer patient education programs and services, the National Cancer Institute and the American Cancer Society have the abilities to meet a wide variety of cancer patient education needs. With federal support and connections to national organizations and the comprehensive and clinical cancer center networks, the National Cancer Institute has access to nationwide experts in medical care and the resources to develop, design, and promote quality, state-of-the-art education programs. The American Cancer Society, with its strong volunteer community base, can pull together local expertise and collaborate with local organizations to meet the special needs of local population groups. In addition, the American Cancer Society volunteer committees have the flexibility to individualize programming and resources to answer specific patient/family education problems. As the number of people affected by cancer continues to raise, and as organizations realize the need to maximize their resources with collaborative efforts, the National Cancer Institute and the American Cancer Society are challenged to focus their energies on the patient education initiatives that build upon and combine their unique strengths.  相似文献   
4.
5.
6.
7.
BACKGROUND: Since 1997, a number of trials have shown promising results in treating generalized vitiligo with narrowband ultraviolet B (UVB) both in adults and children. However, there is little knowledge concerning the duration and permanency of the treatment-induced repigmentation. OBJECTIVE: Our main objective was to perform a follow-up trial of successfully treated patients receiving narrowband UVB for generalized vitiligo. METHODS: We have investigated to what degree the treatment-induced repigmentation remains stable for up to 2 years post-treatment. We performed an initial open trial including 31 patients with generalized vitiligo. They received narrowband UVB thrice weekly for up to 12 months. Patients experiencing > 75% repigmentation were defined responders and were included in the follow-up trial. Responders were followed every 6 months for up to 2 years after cessation of treatment. We observed the pigmentation status and registered any changes indicating loss of pigmentation and relapse. RESULTS: Eleven of the 31 treated patients were included in the follow-up trial. Six patients had relapse and five patients had stable response 24 months after cessation of treatment. Four out of six relapses were within 6 months post-treatment. CONCLUSION: In our study population of 31 patients with generalized vitiligo, five patients (16%) experienced > 75% stable repigmentation 2 years after cessation of a treatment programme of up to 1 years narrowband UVB therapy.  相似文献   
8.
We report two clinical pregnancies occurring after intracytoplasmic sperm injection (ICSI) using cryopreserved spermatozoa obtained from testicular biopsy, made in two different infertility situations in our clinic. The first patient showed a secretory azoospermia associated with elevated serum follicular stimulating hormone (FSH) level and spermiogenesis maturation arrest. The second patient was affected by azoospermia resulting from bilateral epididymal obstruction. Spermatozoa present in the wet preparation of testicular biopsy made on the day of scrotal exploration were cryopreserved within the testicular tissue for both men. Intracytoplasmic injections were performed at a later date, using spermatozoa prepared from frozen-thawed tissues. In each case, three embryos were obtained and transferred in utero. The transfers resulted in a twin pregnancy for the first case, and in a singleton pregnancy for the second. Living foetuses were seen in the ultrasound scan at the 7th week and both pregnancies are proceeding to date beyond 30 weeks without complications.   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