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   5342篇
  免费   305篇
  国内免费   55篇
耳鼻咽喉   88篇
儿科学   60篇
妇产科学   184篇
基础医学   837篇
口腔科学   186篇
临床医学   538篇
内科学   1152篇
皮肤病学   54篇
神经病学   426篇
特种医学   295篇
外科学   621篇
综合类   104篇
一般理论   1篇
预防医学   291篇
眼科学   46篇
药学   437篇
中国医学   54篇
肿瘤学   328篇
  2023年   15篇
  2022年   20篇
  2021年   167篇
  2020年   79篇
  2019年   119篇
  2018年   144篇
  2017年   110篇
  2016年   164篇
  2015年   202篇
  2014年   253篇
  2013年   299篇
  2012年   494篇
  2011年   428篇
  2010年   229篇
  2009年   184篇
  2008年   320篇
  2007年   341篇
  2006年   325篇
  2005年   304篇
  2004年   244篇
  2003年   222篇
  2002年   207篇
  2001年   113篇
  2000年   123篇
  1999年   70篇
  1998年   27篇
  1997年   27篇
  1996年   21篇
  1995年   13篇
  1994年   18篇
  1993年   13篇
  1992年   31篇
  1991年   34篇
  1990年   28篇
  1989年   25篇
  1988年   25篇
  1987年   38篇
  1986年   34篇
  1985年   13篇
  1984年   20篇
  1983年   20篇
  1982年   10篇
  1981年   14篇
  1980年   8篇
  1979年   14篇
  1978年   12篇
  1974年   13篇
  1972年   15篇
  1970年   7篇
  1965年   6篇
排序方式: 共有5702条查询结果,搜索用时 656 毫秒
1.
2.
3.
4.
5.
6.
7.
[Purpose] This study aimed to examine the correlation between health consciousness behavior and health-promoting behavior and quality of life, and to examine the factors affecting the quality of life for elders in South Korea. [Participants and Methods] This study is a cross-sectional study. A total of 191 respondents were selected through convenient sampling. Data were collected with a self-reported questionnaire from August 20 to September 20, 2019. [Results] Differences in health consciousness behavior and health-promoting behavior according to general characteristics and health behavior were as follows. Health consciousness behavior was significantly different according to gender, age, education, religion, occupation, exercise, smoking, drinking, health checkup. Health health-promoting behavior was significantly different according to gender, age, education, stress, health status, drinking. Quality of life was significantly different according to education, stress, health status, exercise, drinking. There was a positive correlation between health-promoting behavior and quality of life. Fifty three point zero percent of the variance in quality of life was explained by health-promoting behavior, health status and exercise. [Conclusion] The findings of this study may be useful in understanding the quality of life for elders and developing more specific programs about health-promoting behavior programs and health status and exercise management strategy is required.Key words: Health behavior, Health promotion, Quality of life  相似文献   
8.
Cho  Dan Bi  Lee  Won  Cha  Jae Myung  Kim  Jee Hyun  Kim  Jinsu  Kang  Sang Bum  Eun  Chang Soo 《Digestive diseases and sciences》2022,67(7):2857-2865
Digestive Diseases and Sciences - Perforation is the most serious adverse event of colonoscopy, but rarely considered from the view of colonoscopists’ second victim experience and perception...  相似文献   
9.
Direct peroral cholangioscopy (POC) using an ultra‐slim upper endoscope is one modality of POC for intraductal endoscopic evaluation and treatment of the bile duct. Choledochoduodenostomy (CDS) is one modality of biliary bypass surgery that provides a new route to the bile duct. We carried out direct POC using an ultra‐slim upper endoscope without the use of accessories in 10 patients (four sump syndromes, three bile duct strictures and three intrahepatic duct stones) previously undergoing surgical CDS. Direct POC was successful in all patients. The use of an intraductal balloon catheter was required in one patient for advancement of the endoscope into the bile duct. Distal bile ducts with sump syndromes were cleared using baskets and water irrigation under direct POC. Cholangiocarcinoma was diagnosed in one patient with hilar bile duct stricture after cholangioscopic evaluation and a targeting forceps biopsy under direct POC. Intrahepatic duct stones were successfully extracted after intraductal fragmentation under direct POC. Oozing bleeding occurred during intraductal lithotripsy but stopped spontaneously. Direct POC using an ultra‐slim upper endoscope without the assistance of accessories can easily be carried out in patients undergoing CDS.  相似文献   
10.
While metastasis, the main cause of lung cancer-related death, has been extensively studied, the underlying molecular mechanism remains unclear. A previous clinicogenomic study revealed that expression of N-acetylgalactosaminyltransferase (GalNAc-T14), is highly inversely correlated with recurrence-free survival in those with non-small cell lung cancer (NSCLC). However, the underlying molecular mechanism(s) has not been determined. Here, we showed that GalNAc-T14 expression was positively associated with the invasive phenotype. Microarray and biochemical analyses revealed that HOXB9, the expression of which was increased in a GalNAc-T14-dependent manner, played an important role in metastasis. GalNAc-T14 increased the sensitivity of the WNT response and increased the stability of the β-catenin protein, leading to induced expression of HOXB9 and acquisition of an invasive phenotype. Pharmacological inhibition of β-catenin in GalNAc-T14-expressing cancer cells suppressed HOXB9 expression and invasion. A meta-analysis of clinical genomics data revealed that expression of GalNAc-T14 or HOXB9 was strongly correlated with reduced recurrence-free survival and increased hazard risk, suggesting that targeting β-catenin within the GalNAc-T14/WNT/HOXB9 axis may be a novel therapeutic approach to inhibit metastasis in NSCLC.  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