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   12529篇
  免费   875篇
  国内免费   21篇
耳鼻咽喉   88篇
儿科学   404篇
妇产科学   372篇
基础医学   1528篇
口腔科学   137篇
临床医学   2204篇
内科学   1985篇
皮肤病学   164篇
神经病学   1217篇
特种医学   270篇
外科学   1217篇
综合类   221篇
一般理论   24篇
预防医学   1501篇
眼科学   285篇
药学   825篇
  2篇
中国医学   7篇
肿瘤学   974篇
  2023年   57篇
  2022年   128篇
  2021年   216篇
  2020年   138篇
  2019年   223篇
  2018年   256篇
  2017年   205篇
  2016年   202篇
  2015年   232篇
  2014年   316篇
  2013年   577篇
  2012年   771篇
  2011年   891篇
  2010年   472篇
  2009年   453篇
  2008年   807篇
  2007年   812篇
  2006年   878篇
  2005年   856篇
  2004年   907篇
  2003年   843篇
  2002年   756篇
  2001年   168篇
  2000年   115篇
  1999年   139篇
  1998年   157篇
  1997年   130篇
  1996年   100篇
  1995年   103篇
  1994年   76篇
  1993年   78篇
  1992年   103篇
  1991年   72篇
  1990年   83篇
  1989年   65篇
  1988年   62篇
  1987年   63篇
  1986年   81篇
  1985年   62篇
  1984年   66篇
  1983年   70篇
  1982年   56篇
  1981年   65篇
  1980年   70篇
  1979年   42篇
  1978年   44篇
  1977年   37篇
  1976年   32篇
  1975年   32篇
  1973年   35篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
While peer support has been investigated in multiple clinical contexts, its application to the postpartum setting is unknown. The aim was to assess acceptability of a postpartum peer support program for women with diabetes. Observational survey-based needs assessment of forty low-income women with diabetes, receiving care at a major medical institution. Mean age and gravidity were 30.7 years and 3.15 ± 1.67 respectively. 45 % expressed interest in a “buddy.” There was no significant difference between groups desiring and not desiring this program. A majority of respondents desired telephone, text messaging, and in-person contacts (79.2, 72.1, 83.8 %), with 72.5 % of patients desiring diabetes-related activities during clinic waiting time. Many women desire a postpartum diabetes reciprocal peer program for support outside of clinician visits. Patients are receptive to educational services during their wait and outside of clinic time, a potentially valuable opportunity to share important health information.  相似文献   
3.
Annals of Hematology - This study assessed treatment patterns and healthcare resource utilization (HRU) of patients with severe aplastic anemia (SAA) with insufficient response to immunosuppressive...  相似文献   
4.
Purpose: To test the effectiveness of a school-based, nurse-facilitated support group in increasing perceptions of scholastic competence, social acceptance, behavioral conduct, perceived athletic competence, perceived physical appearance, and perceived global self-worth in preadolescents diagnosed with attention deficit disorder (ADD) or attention deficit hyperactivity disorder (ADHD).
Design: A quasi-experimental design with 65 preadolescents diagnosed with ADD or ADHD in an upper-middle class community in the United States.
Methods: Participants randomly assigned to either the control or experimental group completed Harter's Self-Perception Profile for Children instrument at the beginning of the study and 4 weeks later. Students in the experimental condition participated in a school-nurse facilitated support group which met twice weekly for 4 weeks.
Findings: Participants in the support group had increased scores on each of the six subscales, with significant increases on four of the subscales, including perceived social acceptance, perceived athletic competence, perceived physical appearance, and perceived global self-worth.
Conclusion: Participation in a school-based, nurse-led support group was positively associated with perception of self-worth in preadolescents diagnosed with ADD or ADHD.  相似文献   
5.
The purpose of this study was to determine whether blood lipid and lipoprotein concentrations varied in 5 men with advanced HIV-1 infection after 12 months of aerobic exercise training. Prior to exercise, the mean baseline cholesterol and high-density lipoprotein cholesterol (HDL-C) serum concentration were each lower, and mean baseline triglyceride concentration was higher compared to a healthy population norm. Consistent exercise training for 12 months failed to significantly (p > .05) alter cholesterol or HDL-C. Triglyceride concentration was significantly (p < .05) elevated above baseline (63 mg/dL) regardless of exercise compliance. The results suggest that long-term exercise training cannot correct lipid profile abnormality, particularly hypertriglyceridemia, common to individuals with advanced HIV-1 infection.  相似文献   
6.
7.
Abstract:  The risks of developing malignant melanoma (MM) include ultraviolet irradiation and genetic factors. To examine the contribution of rare and common variation within known MM genes in sporadic US MM patients, coding regions of known MM susceptibility genes [cyclin-dependent kinase inhibitor 2A ( CDKN2A ), cyclin-dependent kinase 4, melanocortin 1 receptor ( MC1R ) and tyrosinase ( TYR )] were resequenced in 109–135 MM cases. The significance of variants was examined by comparing their frequencies in 390 cancer-free controls. Potential deleterious mutations in CDKN2A were found in two patients and two others had variants of unknown significance. Cases were more likely than controls to harbour the MC1R 'R' variants known or predicted to alter its function ( P  = 0.002), particularly the R160W variant ( P  = 0.0035). The associated TYR R402Q variant (rs1126809*A) was found in 29% of cases, similar to what has been described previously. One MM patient with a family history of MM, who had developed other skin cancers, was homozygous for a novel TYR variant (P406L) of unknown significance. Hence, rare variants in TYR may be important risk factors for skin cancer.  相似文献   
8.
9.
A peculiarly effective intervention by the author's psychoanalyst is explored and discussed in terms of its implicitly expressive properties. It is placed in the context of the classical concept of opacity and more flexible Sullivanian ideas, as expanded and clarified by Havens.  相似文献   
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