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   1634597篇
  免费   134333篇
  国内免费   2633篇
耳鼻咽喉   22125篇
儿科学   53832篇
妇产科学   47028篇
基础医学   232304篇
口腔科学   48090篇
临床医学   145217篇
内科学   320210篇
皮肤病学   34520篇
神经病学   132845篇
特种医学   66074篇
外国民族医学   475篇
外科学   247929篇
综合类   40266篇
现状与发展   3篇
一般理论   566篇
预防医学   126903篇
眼科学   37263篇
药学   123722篇
  5篇
中国医学   3011篇
肿瘤学   89175篇
  2018年   15362篇
  2016年   13388篇
  2015年   15547篇
  2014年   21377篇
  2013年   32490篇
  2012年   44197篇
  2011年   46423篇
  2010年   27253篇
  2009年   26050篇
  2008年   44393篇
  2007年   46750篇
  2006年   47583篇
  2005年   46207篇
  2004年   45442篇
  2003年   43473篇
  2002年   42630篇
  2001年   76608篇
  2000年   79314篇
  1999年   67232篇
  1998年   18201篇
  1997年   16697篇
  1996年   16670篇
  1995年   16381篇
  1994年   15374篇
  1993年   14520篇
  1992年   56151篇
  1991年   54422篇
  1990年   53215篇
  1989年   51432篇
  1988年   47807篇
  1987年   47105篇
  1986年   44824篇
  1985年   43347篇
  1984年   32466篇
  1983年   27926篇
  1982年   16443篇
  1981年   14699篇
  1980年   13841篇
  1979年   30837篇
  1978年   21378篇
  1977年   18018篇
  1976年   16939篇
  1975年   17804篇
  1974年   21736篇
  1973年   20944篇
  1972年   19136篇
  1971年   18042篇
  1970年   16529篇
  1969年   15460篇
  1968年   14120篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
Parhiala  P.  Ranta  K.  Gergov  V.  Kontunen  J.  Law  R.  La Greca  A. M.  Torppa  M.  Marttunen  M. 《School mental health》2020,12(2):265-283

In order to offer early and accessible treatment for adolescents with depression, brief and effective treatments in adolescents’ everyday surroundings are needed. This randomized controlled trial studied the preliminary effectiveness, feasibility, and acceptability of interpersonal counseling (IPC) and brief psychosocial support (BPS) in school health and welfare services. The study was conducted in the 28 lower secondary schools of a large city in Southern Finland, randomized to provide either IPC or BPS. Help-seeking 12–16-year-old adolescents with mild-to-moderate depression, with and without comorbid anxiety, were included in the study. Fifty-five adolescents received either 6 weekly sessions of IPC or BPS and two follow-up sessions. Outcome measures included self- and clinician-rated measures of depression, global functioning, and psychological distress/well-being. To assess feasibility and acceptability of the treatments, adolescents’ and counselors’ treatment compliance and satisfaction with treatment were assessed. Both treatments were effective in reducing depressive disorders and improving adolescents’ overall functioning and well-being. At post-treatment, in both groups, over 50% of adolescents achieved recovery based on self-report and over 70% based on observer report. Effect sizes for change were medium or large in both groups at post-treatment and increased at 6-month follow-up. A trend indicating greater baseline symptom severity among adolescents treated in the IPC-providing schools was observed. Adolescents and counselors in both groups were satisfied with the treatment, and 89% of the adolescents completed the treatments and follow-ups. This trial suggests that both IPC and BPS are feasible, acceptable, and effective treatments for mild-to-moderate depression in the school setting. In addition, IPC seems effective even if comorbid anxiety exists. Our study shows that brief, structured interventions, such as IPC and BPS, are beneficial in treating mild-to-moderate depression in school settings and can be administered by professionals working at school.

Trial registrationhttp://www.clinicaltrials.gov. Unique identifier: NCT03001245.

  相似文献   
62.
63.
64.
65.
The Latin American population has a double way of immigration, one toward the United States by proximity and another toward Spain by sociocultural affinity. This population increase is affecting organ donation and transplantation in receiving countries.

Objective

To analyze the brain death (BD) concept knowledge in the Dominican Republic immigrant population in Florida (United States) and Spain.

Method

Population under study: Population born in the Dominican Republic, resident in Florida (United States) and in Spain. Inclusion criteria: Population older than 15 years stratified by age and sex. Assessment instrument: Donation attitude questionnaire PCID-DTO-Ríos. Fieldwork: Random selection based on stratification. Immigration support association collaboration in Florida and Spain was needed to locate potential respondents. Completion was anonymous and self-administered, with verbal consent.

Results

A total of 123 respondents, 57 residents in Spain and 66 in Florida, have been included in the study. The 27% (n = 33) of the respondents knowledgeable of the BD concept consider it the death of an individual. Of the remainder, 52% (n = 64) do not know about it, and the remaining 21% (n = 26) believe it does not mean the death of a patient. No differences were observed regarding migration countries (P > .05). There was no association of the BD concept with other psychosocial factors analyzed or with the attitude toward organ donation.

Conclusions

Knowledge of the BD concept among the Dominican immigrant population is similar in Spain and Florida, and, unlike most studies, there is no objective association with the attitude toward organ donation.  相似文献   
66.
67.
68.
Abstract

Purpose: We examined underlying psychosocial processes of a behavioral treatment for urinary incontinence (UI) of prostate cancer survivors.

Design: Secondary analysis of data collected from a clinical trial.

Sample: Two hundred forty-four prostate cancer survivors who participated in a clinical trial of behavioral intervention to UI as intervention or control subjects.

Methods: The participants had a 3-month behavioral intervention or usual care and were followed up for an additional 3?months. They were assessed at baseline, 3, and 6?months. Latent growth curve models were performed to examine trajectories of each study variable and relationships among the variables.

Findings: Increasing self-efficacy and social support were significantly and independently associated with more reduction of urinary leakage frequency over time.

Implications for psychosocial oncology: Providing problem-solving skills and social support, including peer support, are essential for empowering patients to reduce UI.  相似文献   
69.
70.
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