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   29261篇
  免费   6147篇
  国内免费   81篇
耳鼻咽喉   139篇
儿科学   732篇
妇产科学   1804篇
基础医学   1501篇
口腔科学   279篇
临床医学   16344篇
内科学   4256篇
皮肤病学   136篇
神经病学   1592篇
特种医学   544篇
外国民族医学   5篇
外科学   2396篇
综合类   335篇
现状与发展   1篇
一般理论   18篇
预防医学   3044篇
眼科学   257篇
药学   1071篇
中国医学   5篇
肿瘤学   1030篇
  2023年   816篇
  2022年   163篇
  2021年   398篇
  2020年   710篇
  2019年   375篇
  2018年   1267篇
  2017年   1484篇
  2016年   1568篇
  2015年   1652篇
  2014年   1782篇
  2013年   2107篇
  2012年   1007篇
  2011年   1296篇
  2010年   1356篇
  2009年   1608篇
  2008年   1223篇
  2007年   1160篇
  2006年   1120篇
  2005年   1061篇
  2004年   986篇
  2003年   846篇
  2002年   774篇
  2001年   789篇
  2000年   568篇
  1999年   653篇
  1998年   687篇
  1997年   803篇
  1996年   734篇
  1995年   636篇
  1994年   487篇
  1993年   406篇
  1992年   426篇
  1991年   402篇
  1990年   386篇
  1989年   322篇
  1988年   257篇
  1987年   264篇
  1986年   227篇
  1985年   257篇
  1984年   195篇
  1983年   190篇
  1982年   161篇
  1981年   150篇
  1980年   115篇
  1979年   193篇
  1978年   129篇
  1977年   132篇
  1976年   115篇
  1974年   95篇
  1972年   138篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
The paper presents the results of a pilot study which involved 50 nurses from several departments of internal medicine of The State Clinical Hospital of the Collegium Medicum, Jagiellonian University in Cracow. The results are based on the Statement Response Questionnaire. They show that the most common responses of the nurses in the face of anxiety expressed by patients are cheering up the patient, collecting information about the symptom, and offering explanation of the symptom. The least common responses included expressing one's own positive emotions and showing empathy towards the patient.  相似文献   
32.
33.
The clinical research coordinator plays a crucial role in organizing a site's participation in the expanding arena of multicenter medical and pharmacologic clinical trials. This summary clarifies the role of the clinical research coordinator for inexperienced staff members assuming these responsibilities and outlines planning procedures leading to successful implementation. Emphasis is placed on establishing an interdependent relationship with the principal investigator, careful protocol assessment, team building, and staff feedback. Useful tools such as study manuals and physicians' study orders are described.  相似文献   
34.
Objective: To determine the effect of indwelling versus intermittent feeding tube placement on weight gain, apnea, and bradycardia in premature neonates.
Design: Eligible subjects were assigned randomly to either feeding tube method. Each subject was followed for 6 days.
Setting: The study was conducted in a secondary level neonatal intensive-care unit (NICU), a tertiary level NICU in a perinatal center, and a tertiary level NICU in a referral center.
Patients/Participants: Neonates who were 24–34 weeks gestational age, developmentally appropriate for gestational age, medically stable, on full enteral feedings through an orogastric or a nasogastric tube, and not fluid restricted. Ninety-three neonates were enrolled-49 in the indwelling group and 44 in the intermittent group. Nine neonates did not complete the study.
Interventions: Nasogastric indwelling feeding tubes were placed and left in site for up to 3 days. Orogastric intermittent feeding tubes were placed for each feeding and removed at completion of the feeding.
Main outcome measures: Weight gain, apnea, and bradycardia. Results: Members of both groups had similar demographic characteristics, clinical problems, and nutritional intake. No statistical differences were found between the two groups in weight gain or episodes of apnea and bradycardia.
Conclusions: There were no statistically or clinically significant differences between the two groups. The intermittent method of feeding is more expensive. Because no clinical differences were found, the type of tube placement chosen for feeding the premature infant may be based on economics.  相似文献   
35.
In the context of an interview study concerned with self-determination in psychiatric patients, this paper describes the preconditions for and consequences of self-determination from the point of view of psychiatric patients themselves. The data were collected in semi-structured interviews with long-term psychiatric patients ( n =72) and analysed using the method of content analysis. Responses on the preconditions for self-determination were grouped into three categories: firstly, there were those who said that reference to self-determination in the case of psychiatric patients is nonsense; secondly, there were those who said that self-determination requires no preconditions; and thirdly, there were those who said that there are certain preconditions, such as the ability to think and make decisions, activity, obedience, and illness. Both positive and negative consequences were identified in situations where self-determination is maintained, but only negative consequences in situations where self-determination is lost. On the basis of these tentative results, self-determination seemed to be relevant in psychiatric nursing. We are continuing to develop and test an instrument for the evaluation of the opportunity for self-determination in clinical practice.  相似文献   
36.
37.
Reported behavioral improvement among autistic patients following feufluramine treatment and a high serotonin level among certain chronic schizophrenic patients suggested that fenfluramine treatment might be beneficial with such schizophrenic patients, especially within the realm of neuropsychological and communicative functioning. A brief neuropsychological battery was administered to eight chronic schizophrenic subjects before, during, and after fenfluramine treatment. Conversations in controlled settings were audiotaped before and during fenfluramine treatment for seven of these subjects and one additional subject. These language samples were analyzed for communicative competence and evidence of thought disorder. Overall, neuropsychological and communicative functioning was worse under the fenfluramine condition, even though blood serotonin levels were about half those at baseline conditions. The results suggest that it is not the higher levels of blood serotonin by themselves that are related to depressed neuropsychological, communicative, and other functioning. In fact, the higher levels of serotonin may well be related to adaptations for maximal level of functioning. These results suggest caution in the use of fenfluramine for other schizophrenic populations.  相似文献   
38.
This paper describes and analyses, from a sociocultural viewpoint, the ways of life of discharged long-term psychiatric patients in northern Finland The paper focuses on subjectivity control of life and fundamental experiences in life The data consist of interviews with 25 outpatients who have moved to live in residential homes, rehabilitation centres or their own homes after receiving preparatory training in the psychiatric hospital The findings suggest that the way of life of the outpatients did not significantly differ from that of other people belonging to the same generation of Finns With respect to control of life, a conspicuous feature was the strong tendency to let themselves be led by others, and to self-sacrifice for the good of others For the patients, independence was the best aspect of open care Fear for being branded as a psychiatric case or as a former mental patient threatened the patients'external control of life The central element of control of life of the Finns is work The outpatients thought work a matter of honour and they did not find their present, inactive way of life satisfactory  相似文献   
39.
40.
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