全文获取类型
| 收费全文 | 1284386篇 |
| 免费 | 86812篇 |
| 国内免费 | 1946篇 |
专业分类
| 耳鼻咽喉 | 18254篇 |
| 儿科学 | 42268篇 |
| 妇产科学 | 37812篇 |
| 基础医学 | 187192篇 |
| 口腔科学 | 35414篇 |
| 临床医学 | 108284篇 |
| 内科学 | 251951篇 |
| 皮肤病学 | 26526篇 |
| 神经病学 | 99435篇 |
| 特种医学 | 50024篇 |
| 外国民族医学 | 366篇 |
| 外科学 | 197725篇 |
| 综合类 | 26520篇 |
| 现状与发展 | 1篇 |
| 一般理论 | 300篇 |
| 预防医学 | 92651篇 |
| 眼科学 | 29103篇 |
| 药学 | 97849篇 |
| 18篇 | |
| 中国医学 | 2497篇 |
| 肿瘤学 | 68954篇 |
出版年
| 2018年 | 11844篇 |
| 2015年 | 11622篇 |
| 2014年 | 16009篇 |
| 2013年 | 24354篇 |
| 2012年 | 33550篇 |
| 2011年 | 35942篇 |
| 2010年 | 21207篇 |
| 2009年 | 20015篇 |
| 2008年 | 34985篇 |
| 2007年 | 37951篇 |
| 2006年 | 38507篇 |
| 2005年 | 37811篇 |
| 2004年 | 36389篇 |
| 2003年 | 35373篇 |
| 2002年 | 34928篇 |
| 2001年 | 58097篇 |
| 2000年 | 59588篇 |
| 1999年 | 50688篇 |
| 1998年 | 14234篇 |
| 1997年 | 12809篇 |
| 1996年 | 13071篇 |
| 1995年 | 12346篇 |
| 1994年 | 11759篇 |
| 1993年 | 10861篇 |
| 1992年 | 40986篇 |
| 1991年 | 40360篇 |
| 1990年 | 39887篇 |
| 1989年 | 38710篇 |
| 1988年 | 36111篇 |
| 1987年 | 35350篇 |
| 1986年 | 33725篇 |
| 1985年 | 32137篇 |
| 1984年 | 23924篇 |
| 1983年 | 20818篇 |
| 1982年 | 12379篇 |
| 1981年 | 10929篇 |
| 1980年 | 10205篇 |
| 1979年 | 22635篇 |
| 1978年 | 15877篇 |
| 1977年 | 13729篇 |
| 1976年 | 12970篇 |
| 1975年 | 14201篇 |
| 1974年 | 16683篇 |
| 1973年 | 16076篇 |
| 1972年 | 15318篇 |
| 1971年 | 14229篇 |
| 1970年 | 13214篇 |
| 1969年 | 12731篇 |
| 1968年 | 11978篇 |
| 1967年 | 10479篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
31.
32.
33.
34.
S. A. Luzhnova A. G. Tyrkov N. M. Gabitova E. A. Yurtaeva 《Pharmaceutical Chemistry Journal》2018,52(6):506-509
35.
36.
37.
Marin D. E. Pistol G. C. Gras M. Palade M. Taranu I. 《Naunyn-Schmiedeberg's archives of pharmacology》2018,391(10):1147-1156
Naunyn-Schmiedeberg's Archives of Pharmacology - Ochratoxin A (OTA) and aristolochic acid (AA) are toxins that can frequently contaminate cereals and cereals-based products. The present study... 相似文献
38.
Conrad M. Tobert Sarah L. Mott Kenneth G. Nepple 《Journal of the Academy of Nutrition and Dietetics》2018,118(1):125-131
Background
Malnutrition is a significant problem for hospitalized patients. However, the true prevalence of reported malnutrition diagnosis in real-world clinical practice is largely unknown. Using a large collaborative multi-institutional database, the rate of malnutrition diagnosis was assessed and used to assess institutional variables associated with higher rates of malnutrition diagnosis.Objective
The aim of this study was to define the prevalence of malnutrition diagnosis reported among inpatient hospitalizations.Design
The University Health System Consortium (Vizient) database was retrospectively reviewed for reported rates of malnutrition diagnosis.Participants/setting
All adult inpatient hospitalization at 105 member institutions during fiscal years 2014 and 2015 were evaluated.Main outcome measures
Malnutrition diagnosis based on the presence of an International Classification of Diseases-Ninth Revision diagnosis code.Statistical analysis
Hospital volume and publicly available hospital rankings and patient satisfaction scores were obtained. Multiple regression analysis was performed to assess the association between these variables and reported rates of malnutrition.Results
A total of 5,896,792 hospitalizations were identified from 105 institutions during the 2-year period. It was found that 292,754 patients (5.0%) had a malnutrition diagnosis during their hospital stay. By institution, median rate of malnutrition diagnosis during hospitalization was 4.0%, whereas the rate of severe malnutrition diagnosis was 0.9%. There was a statistically significant increase in malnutrition diagnosis from 4.0% to 4.9% between 2014 and 2015 (P<0.01). Institutional factors associated with increased diagnosis of malnutrition were higher hospital volume, hospital ranking, and patient satisfaction scores (P<0.01).Conclusions
Missing a malnutrition diagnosis appears to be a universal issue because the rate of malnutrition diagnosis was consistently low across academic medical centers. Institutional variables were associated with the prevalence of malnutrition diagnosis, which suggests that institutional culture influences malnutrition diagnosis. Quality improvement efforts aimed at improved structure and process appear to be needed to improve the identification of malnutrition. 相似文献39.
40.
Joseph J. Knapik Krista G. Austin Emily K. Farina Harris R. Lieberman 《Journal of the Academy of Nutrition and Dietetics》2018,118(8):1370-1388