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   132821篇
  免费   17069篇
  国内免费   7256篇
耳鼻咽喉   1614篇
儿科学   2009篇
妇产科学   1291篇
基础医学   11618篇
口腔科学   3364篇
临床医学   18814篇
内科学   20648篇
皮肤病学   1919篇
神经病学   8039篇
特种医学   5478篇
外国民族医学   30篇
外科学   15888篇
综合类   22674篇
现状与发展   29篇
一般理论   10篇
预防医学   11888篇
眼科学   2553篇
药学   12176篇
  115篇
中国医学   6751篇
肿瘤学   10238篇
  2024年   156篇
  2023年   2431篇
  2022年   2508篇
  2021年   5044篇
  2020年   4766篇
  2019年   3440篇
  2018年   4661篇
  2017年   4963篇
  2016年   4965篇
  2015年   6785篇
  2014年   8438篇
  2013年   8571篇
  2012年   10722篇
  2011年   11523篇
  2010年   9417篇
  2009年   8518篇
  2008年   8806篇
  2007年   8490篇
  2006年   7787篇
  2005年   7004篇
  2004年   5171篇
  2003年   4914篇
  2002年   4142篇
  2001年   2790篇
  2000年   2120篇
  1999年   1578篇
  1998年   1140篇
  1997年   1130篇
  1996年   881篇
  1995年   805篇
  1994年   618篇
  1993年   439篇
  1992年   378篇
  1991年   344篇
  1990年   272篇
  1989年   252篇
  1988年   206篇
  1987年   175篇
  1986年   155篇
  1985年   122篇
  1984年   91篇
  1983年   56篇
  1982年   57篇
  1981年   41篇
  1980年   37篇
  1979年   25篇
  1978年   33篇
  1975年   23篇
  1973年   22篇
  1972年   24篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
目的分析江苏省启东市1972—2016年胃癌死亡流行特征。方法收集启东市1972—2016年恶性肿瘤死亡登记数据库及历年人口资料, 计算死亡率、中国人口标化率(中标率)、世界人口标化率(世标率)、35~64岁截缩率、0~74岁累积死亡率、累积死亡风险、变化百分比、死亡率年均变化百分比。结果 1972—2016年启东市胃癌死亡例数为15 863例, 占全部恶性肿瘤死亡例数的16.04%, 胃癌死亡率为31.37/10万, 中标率为12.97/10万, 世标率为21.39/10万, 35~64岁截缩死亡率为28.86/10万, 0~74岁累积死亡率为2.54%, 胃癌死亡累积风险为2.51%。男性死亡10 114例, 男性死亡率、中标率、世标率分别为40.53/10万、17.98/10万和30.13/10万;女性死亡5 749例, 女性死亡率、中标率、世标率分别为22.45/10万、8.52/10万和13.92/10万。25岁以下各年龄组的死亡率<1/10万, 死亡率随年龄的增长而升高, 50~岁组达到并超过人群的平均死亡率水平, 80~岁组达到死亡高峰。1972—2016年间胃癌死...  相似文献   
4.
Smoking cessation reduces the risk of death, improves recovery, and reduces the risk of hospital readmission. Evidence and policy support hospital admission as an ideal time to deliver smoking-cessation interventions. However, this is not well implemented in practice. In this systematic review, the authors summarize the literature on smoking-cessation implementation strategies and evaluate their success to guide the implementation of best-practice smoking interventions into hospital settings. The CINAHL Complete, Embase, MEDLINE Complete, and PsycInfo databases were searched using terms associated with the following topics: smoking cessation, hospitals, and implementation. In total, 14,287 original records were identified and screened, resulting in 63 eligible articles from 56 studies. Data were extracted on the study characteristics, implementation strategies, and implementation outcomes. Implementation outcomes were guided by Proctor and colleagues' framework and included acceptability, adoption, appropriateness, cost, feasibility, fidelity, penetration, and sustainability. The findings demonstrate that studies predominantly focused on the training of staff to achieve implementation. Brief implementation approaches using a small number of implementation strategies were less successful and poorly sustained compared with well resourced and multicomponent approaches. Although brief implementation approaches may be viewed as advantageous because they are less resource-intensive, their capacity to change practice in a sustained way lacks evidence. Attempts to change clinician behavior or introduce new models of care are challenging in a short time frame, and implementation efforts should be designed for long-term success. There is a need to embrace strategic, well planned implementation approaches to embed smoking-cessation interventions into hospitals and to reap and sustain the benefits for people who smoke.  相似文献   
5.
6.

Background

Survival in cancer patients is associated with a multitude of biological, social, and psychological factors. Although it is well established that all these factors add to overall mortality, it is not well understood how the predictive power of these parameters changes in a comprehensive model and over time.

Methods

Patients who attended the authors’ outpatient clinic were invited to participate. The authors followed 5180 mixed cancer patients (51.1% female; mean age, 59.1 years [SD = 13.8]) for up to 16 years and analyzed biological (age, sex, cancer site, anemia), psychological (anxiety, depression), and social variables (marital status, education, employment status) potentially predicting overall survival in a Cox proportional hazards model.

Results

The median survival time for the entire sample was 4.3 years (95% confidence interval, 4.0–4.7). The overall survival probabilities for 1 and 10 years were 76.8% and 38.0%, respectively. Following an empirical approach, the authors split the time interval into five periods: acute, subacute, short-term, medium-term, and long-term. A complex pattern of variables predicted overall survival differently in the five periods. Biological parameters were important throughout most of the time, social parameters were either time-independent predictors or tended to be more important in the longer term. Of the psychological parameters, only depression was a significant predictor and lost its predictive power in the long-term.

Conclusions

The findings of this study allow the development of comprehensive patient-specific models of risk and resilience factors addressing biopsychosocial needs of cancer patients, paving the way for a personalized treatment plan that goes beyond biomedical cancer care.  相似文献   
7.
8.
Sepsis is a life-threatening condition and a global disease burden.Heterogeneous syndrome is defined as severe organ dysfunction caused by a dysregulated host response to infection,with renewed emphasis on the immune pathophysiology.Researchers worldwide constantly update the diagnostic criteria of sepsis and have introduced concepts such as“sepsis-3”“Surviving Sepsis Campaign(SSC)”“Early Goal-Directed Therapy(EGDT)”,the 3-h and 6-h bundles to an hour-1 bundle[1],“limited ventilation”“the best PEEP[2]”,and“Lung Protective-Ventilation”.Despite all efforts of experimental and clinical research during the last three decades,the ability to positively influence the course and outcome of the syndrome remains limited.  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