全文获取类型
收费全文 | 2087篇 |
免费 | 475篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 19篇 |
儿科学 | 53篇 |
妇产科学 | 58篇 |
基础医学 | 94篇 |
口腔科学 | 49篇 |
临床医学 | 307篇 |
内科学 | 629篇 |
皮肤病学 | 12篇 |
神经病学 | 176篇 |
特种医学 | 38篇 |
外科学 | 152篇 |
综合类 | 8篇 |
预防医学 | 545篇 |
眼科学 | 21篇 |
药学 | 44篇 |
肿瘤学 | 361篇 |
出版年
2024年 | 11篇 |
2023年 | 68篇 |
2022年 | 36篇 |
2021年 | 69篇 |
2020年 | 105篇 |
2019年 | 55篇 |
2018年 | 82篇 |
2017年 | 83篇 |
2016年 | 113篇 |
2015年 | 115篇 |
2014年 | 157篇 |
2013年 | 220篇 |
2012年 | 78篇 |
2011年 | 86篇 |
2010年 | 123篇 |
2009年 | 184篇 |
2008年 | 99篇 |
2007年 | 63篇 |
2006年 | 86篇 |
2005年 | 38篇 |
2004年 | 40篇 |
2003年 | 40篇 |
2002年 | 37篇 |
2001年 | 63篇 |
2000年 | 42篇 |
1999年 | 50篇 |
1998年 | 50篇 |
1997年 | 35篇 |
1996年 | 30篇 |
1995年 | 22篇 |
1994年 | 24篇 |
1993年 | 17篇 |
1992年 | 30篇 |
1991年 | 28篇 |
1990年 | 14篇 |
1989年 | 20篇 |
1988年 | 16篇 |
1987年 | 20篇 |
1986年 | 12篇 |
1985年 | 16篇 |
1984年 | 13篇 |
1983年 | 9篇 |
1982年 | 7篇 |
1981年 | 7篇 |
1980年 | 9篇 |
1979年 | 9篇 |
1978年 | 4篇 |
1976年 | 4篇 |
1974年 | 4篇 |
1972年 | 5篇 |
排序方式: 共有2566条查询结果,搜索用时 15 毫秒
121.
Shao-Yu Tsai PhD RN Wang-Tso Lee PhD MD Chien-Chang Lee PhD MD Suh-Fang Jeng ScD PT Wen-Chin Weng PhD MD 《Research in nursing & health》2020,43(2):168-175
We conducted a cross-sectional study to examine sleep in mothers of children with epilepsy and its relation to their children's sleep. A total of 133 dyads of mothers and children with epilepsy aged 1.5–6 years were recruited between 2015 and 2018 from a children's hospital in northern Taiwan. Participating families provided demographic and health information, with children wearing an actigraphy monitor for 7 days and mothers completing sleep and depressive mood questionnaires. We found that 76 (57.1%) of the mothers had poor sleep quality, with 65 (48.9%) mothers having a clinically significant depressive symptom score. Mean actigraphic wake after sleep onset in children was 1.42 (standard deviation = 0.51) hours, with 126 (94.7%) of the children having a clinically significant sleep disturbance score. Multivariate regression analyses showed that higher depressive symptom scores in mothers (β = 0.14; p < .01) and higher sleep disturbance scores in children (β = 0.07; p = .04) were associated with poorer maternal sleep quality, even when maternal demographic characteristics and the child's clinical and epilepsy variables were considered. Findings from our study suggest that sleep disturbances are a shared problem for mothers and their children with epilepsy. Sleep in both mothers and their children with epilepsy should be evaluated in pediatric neurologic practices, with maternal depressive symptoms screened concurrently. Future pediatric epilepsy studies are warranted to examine whether a family-based intervention program would be effective to improve sleep in mother-child dyads and to promote better health and functioning of the entire family. 相似文献
122.
Harlyn K. Susarla MPH Kelley M. Dentino BA Elsbeth Kalenderian DDS MPH Rachel B. Ramoni DMD ScD 《Journal of public health dentistry》2014,74(1):21-27
Objectives: To document how race and ethnicity are identified, categorized, and utilized in contemporary dental public health literature. Methods: Two researchers independently performed a literature review of all articles in Community Dentistry and Oral Epidemiology and the Journal of Public Health Dentistry over a 5‐year period (2004‐2009). Articles pertaining to the study of US‐based populations with any mention of race or ethnicity were included. The following data were abstracted from each article: a) how each article broadly described race and/or ethnicity; b) the terms used to specifically define the races and/or ethnicities captured; c) the location of any mention of the concept of race and/or ethnicity; d) the stated purpose for including race and/or ethnicity concepts; e) the stated analytic use of race and/or ethnicity concepts; and f) the stated method used to assess race and/or ethnicity concepts. Results: Overall, race and/or ethnicity concepts were most commonly referred to within the text of the results section. Fifty percent of articles did not state their purpose for including race and/or ethnicity concepts within their studies, while 34.3 percent omitted stating their analytic use of these concepts. When assessing these concepts, 41.4 percent relied upon subject self‐report. Conclusion: These data showed that there was inconsistent documentation of how race and ethnicity was measured. While race and ethnicity are important measures for public health studies and are frequently reported in dental public health research, there is no clear system for classifying these measures. 相似文献
123.
Jesse Mez MD MS Daniel H. Daneshvar MD PhD Bobak Abdolmohammadi BA Alicia S. Chua MS Michael L. Alosco PhD Patrick T. Kiernan BA Laney Evers BA Laura Marshall BA Brett M. Martin MS Joseph N. Palmisano MS Christopher J. Nowinski PhD Ian Mahar PhD Jonathan D. Cherry PhD Victor E. Alvarez MD Brigid Dwyer MD Bertrand R. Huber MD PhD Thor D. Stein MD PhD Lee E. Goldstein MD PhD Douglas I. Katz MD Robert C. Cantu MD Rhoda Au PhD Neil W. Kowall MD Robert A. Stern PhD Michael D. McClean MS ScD Jennifer Weuve MPH ScD Yorghos Tripodis PhD Ann C. McKee MD 《Annals of neurology》2020,87(1):116-131
124.
125.
126.
127.
Rupa Narayan MD Traci M. Blonquist MS Ashkan Emadi MD PhD Robert P. Hasserjian MD Meghan Burke BS Christopher Lescinskas BS Donna S. Neuberg ScD Andrew M. Brunner MD Gabriela Hobbs MD Hanno Hock MD PhD Steven L. McAfee MD Yi-Bin Chen MD Eyal Attar MD Timothy A. Graubert MD Christina Bertoli MSN Jenna A. Moran MSN Meghan K. Bergeron MSN Julia E. Foster MSN Aura Y. Ramos BSN Tina T. Som BSN Megan K. Vartanian BSN RN Jennifer L. Story LPN Kristin McGregor MS Molly Macrae BS Tanya Behnan BS Margaret C. Wey PhD Jessica Rae BSN Frederic I. Preffer PhD Patricia Lesho BA Vu H. Duong MD Mason L. Mann BA Karen K. Ballen MD Christine Connolly BS Philip C. Amrein MD Amir T. Fathi MD 《Cancer》2020,126(6):1264-1273
128.
Scott R. Bauer MD ScM Peggy M. Cawthon PhD MPH Kristine E. Ensrud MD Anne M. Suskind MD MS John C. Newman MD PhD Howard A. Fink MD MPH Kaiwei Lu MS Rebecca Scherzer PhD Andrew R. Hoffman MD Kenneth Covinsky MD Lynn M. Marshall ScD For the Osteoporotic Fractures in Men Research Group 《Journal of the American Geriatrics Society》2022,70(4):1082-1094
129.
Retinoic acid embryopathy 总被引:61,自引:0,他引:61
E J Lammer D T Chen R M Hoar N D Agnish P J Benke J T Braun C J Curry P M Fernhoff A W Grix I T Lott 《The New England journal of medicine》1985,313(14):837-841
Retinoic acid, an analogue of vitamin A, is known to be teratogenic in laboratory animals and has recently been implicated in a few clinical case reports. To study the human teratogenicity of this agent, we investigated 154 human pregnancies with fetal exposure to isotretinoin, a retinoid prescribed for severe recalcitrant cystic acne. The outcomes were 95 elective abortions, 26 infants without major malformations, 12 spontaneous abortions, and 21 malformed infants. A subset of 36 of the 154 pregnancies was observed prospectively. The outcomes in this cohort were 8 spontaneous abortions, 23 normal infants, and 5 malformed infants. Exposure to isotretinoin was associated with an unusually high relative risk for a group of selected major malformations (relative risk = 25.6; 95 per cent confidence interval, 11.4 to 57.5). Among the 21 malformed infants we found a characteristic pattern of malformation involving craniofacial, cardiac, thymic, and central nervous system structures. The malformations included microtia/anotia (15 infants), micrognathia (6), cleft palate (3), conotruncal heart defects and aortic-arch abnormalities (8), thymic defects (7), retinal or optic-nerve abnormalities (4), and central nervous system malformations (18). The pattern of malformation closely resembled that produced in animal studies of retinoid teratogenesis. It is possible that a major mechanism of isotretinoin teratogenesis is a deleterious effect on cephalic neural-crest cell activity that results in the observed craniofacial, cardiac, and thymic malformations. 相似文献
130.
Wasileh Petro-Nustas RN ScD Blanche I Mikhail RN DNSc Omar G Baker RN MSc 《International journal of nursing practice》2001,7(5):349-358
The overall purpose of this paper is to describe the process of utilizing community participation for curriculum design to develop a new school of nursing. A brief Community Needs Assessment Survey was carried out in order to explore community perceptions and expectations of Baccalaureate-prepared nurses in Jordan. The sample consisted of 152 participants who were staff nurses, nurse administrators, nurse supervisors, nurse educators, physicians, pharmacists and consumers of services. Data were collected through a self-administered survey form using open-ended questions. Participants were asked to describe their perceptions of nursing and nurses, the desired professional skills and personal characteristics of the Baccalaureate-prepared nurse, important curriculum contents and to provide suggestions or comments for improving the preparation of Bachelor of Science in Nursing (BSN) nurses. The findings indicated that nursing was viewed as a caring profession where nurses care for the person both in sickness and health. Several professional skills and personal characteristics emerged as being important for the BSN nurse, including clinical competence, the desire to continue learning, communication skills, ethical and moral character, critical thinking, assessment skills, and computer and English-language skills. The participants provided the desired curriculum contents and suggestions related to the expected skills. Implications for nursing education were discussed. 相似文献