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   6384篇
  免费   644篇
  国内免费   10篇
耳鼻咽喉   81篇
儿科学   197篇
妇产科学   164篇
基础医学   808篇
口腔科学   124篇
临床医学   808篇
内科学   1325篇
皮肤病学   100篇
神经病学   822篇
特种医学   190篇
外科学   705篇
综合类   121篇
一般理论   12篇
预防医学   724篇
眼科学   63篇
药学   401篇
中国医学   3篇
肿瘤学   390篇
  2023年   51篇
  2022年   70篇
  2021年   192篇
  2020年   141篇
  2019年   182篇
  2018年   207篇
  2017年   174篇
  2016年   156篇
  2015年   158篇
  2014年   191篇
  2013年   328篇
  2012年   414篇
  2011年   453篇
  2010年   290篇
  2009年   235篇
  2008年   342篇
  2007年   424篇
  2006年   389篇
  2005年   342篇
  2004年   319篇
  2003年   269篇
  2002年   224篇
  2001年   102篇
  2000年   113篇
  1999年   121篇
  1998年   76篇
  1997年   55篇
  1996年   51篇
  1995年   57篇
  1994年   44篇
  1993年   49篇
  1992年   87篇
  1991年   61篇
  1990年   67篇
  1989年   54篇
  1988年   51篇
  1987年   64篇
  1986年   35篇
  1985年   40篇
  1984年   43篇
  1983年   28篇
  1981年   22篇
  1980年   18篇
  1979年   23篇
  1978年   28篇
  1977年   24篇
  1976年   15篇
  1975年   17篇
  1973年   15篇
  1971年   17篇
排序方式: 共有7038条查询结果,搜索用时 843 毫秒
101.
102.
Background: A key feature of health professionals’ training, irrespective of discipline, is the acquisition and application of clinical and communication skills. Despite this, little is known about the potential role of patient feedback on this process. This systematic review aimed to answer the question: How does feedback from patients impact upon healthcare student clinical skill development and learning?

Design: Systematic review of published literature.

Methods: Electronic databases were searched for studies that explored the effects of patient feedback on student learning and were published before March 2016. Eligible articles underwent methodological evaluation using the McMaster University Critical Evaluation Forms and data extraction.

Results: A total of 237 articles were retrieved following searches of electronic databases and hand searches of reference lists. Twelve (7 quantitative, 2 qualitative, 3 mixed methods) studies met the inclusion criteria. Eleven studies reported that patient feedback improved students’ clinical skills.

Conclusion: Minimal research has explored the impact of patient feedback on student learning. The research to date suggests that direct feedback from patients may be beneficial for the development of students’ communication and clinical skills; however, the wide variety of evaluation methods and the lack of validated tools for patients to provide feedback suggest that further exploration is warranted.  相似文献   
103.
104.
105.
106.
Chemotherapy-induced diarrhea(CID)is a common and often severe side effect experienced by colorectal cancer(CRC)patients during their treatment.As chemotherapy regimens evolve to include more efficacious agents,CID is increasingly becoming a major cause of dose limiting toxicity and merits further investigation.Inflammation is a key factor behind gastrointestinal(GI)toxicity of chemotherapy.Different chemotherapeutic agents activate a diverse range of pro-inflammatory pathways culminating in distinct histopathological changes in the small intestine and colonic mucosa.Here we review the current understanding of the mechanisms behind GI toxicity and the mucositis associated with systemic treatment of CRC.Insights into the inflammatory response activated during this process gained from various models of GI toxicity are discussed.The inflammatory processes contributing to the GI toxicity of chemotherapeutic agents are increasingly being recognised as having an important role in the development of anti-tumor immunity,thus conferring added benefit against tumor recurrence and improving patient survival.We review the basic mechanisms involved in the promotion of immunogenic cell death and its relevance in the treatment of colorectal cancer.Finally,the impact of CID on patient outcomes and therapeutic strategies to prevent or minimise the effect of GI toxicity and mucositis are discussed.  相似文献   
107.
108.
Heart disease continues to be the leading cause of death in the United States, with approximately 805 000 cumulative deaths from myocardial infarctions (MI) from 2005 to 2014. Gender and racial/ethnic disparities in MI diagnoses are becoming more evident in quality review audits. Although recent changes in diagnostic codes provided an improved framework, clinically distinguishing types of MI remains a challenge. MI misdiagnoses and health disparities contribute to adverse outcomes in cardiac medicine. We conducted a literature review of relevant biomedical sources related to the classification of MI and disparities in cardiovascular care and outcomes. From the studies analyzed, African Americans and women have higher rates of mortality from MI, are more probably to be younger and present with other comorbidities and are less probably to receive novel therapies with respect to type of MI. As high-sensitivity troponin assays are adopted in the United States, implementation should account for how race and sex differences have been demonstrated in the reference range and diagnostic threshold of the newer assays. More research is needed to assess how the complexity of health disparities contributes to adverse cardiovascular outcomes. Creating dedicated medical quality teams (physicians, nurses, clinical documentation improvement specialists, and medical coders) and incorporating a plan-do-check-adjust quality improvement model are strategies that could potentially help better define and diagnose MI, reduce financial burdens due to MI misdiagnoses, reduce cardiovascular-related health disparities, and ultimately improve and save lives.  相似文献   
109.
110.
Aims:

A review on headache and insomnia revealed that insomnia is a risk factor for increased headache frequency and headache intensity in migraineurs. The authors designed a randomized, double blind, placebo-controlled, parallel-group, pilot study in which migraineurs who also had insomnia were enrolled, to test this observation.

Methodology:

In the study, the authors treated 79 subjects with IHS-II migraine with and/or without aura and with DSM-IV primary insomnia for 6 weeks with 3 mg eszopiclone (Lunesta®) or placebo at bedtime. The treatment was preceded by a 2-week baseline period and followed by a 2-week run-out period.

Results:

Of the 79 subjects treated, 75 were evaluable, 35 in the eszopiclone group, and 40 in the placebo group. At baseline, the groups were comparable except for sleep latency. Of the three remaining sleep variables, total sleep time, nighttime awakenings, and sleep quality, the number of nighttime awakenings during the 6-week treatment period was significantly lower in the eszopiclone group than in the placebo group (P?=?0·03). Of the three daytime variables, alertness, fatigue, and functioning, this was also the case for fatigue (P?=?005). The headache variables, frequency, duration, and intensity, did not show a difference from placebo during the 6-week treatment period.

Conclusions:

The study did not meet primary endpoint, that is, the difference in total sleep time during the 6-week treatment period between eszopiclone and placebo was less than 40 minutes. Therefore, it failed to answer the question as to whether insomnia is, indeed, a risk factor for increased headache frequency and headache intensity in migraineurs.  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