全文获取类型
收费全文 | 19854篇 |
免费 | 1224篇 |
国内免费 | 37篇 |
专业分类
耳鼻咽喉 | 120篇 |
儿科学 | 688篇 |
妇产科学 | 707篇 |
基础医学 | 2692篇 |
口腔科学 | 264篇 |
临床医学 | 3320篇 |
内科学 | 3698篇 |
皮肤病学 | 203篇 |
神经病学 | 1982篇 |
特种医学 | 290篇 |
外科学 | 1417篇 |
综合类 | 249篇 |
一般理论 | 31篇 |
预防医学 | 2795篇 |
眼科学 | 151篇 |
药学 | 1155篇 |
中国医学 | 13篇 |
肿瘤学 | 1340篇 |
出版年
2023年 | 90篇 |
2022年 | 160篇 |
2021年 | 332篇 |
2020年 | 212篇 |
2019年 | 374篇 |
2018年 | 387篇 |
2017年 | 278篇 |
2016年 | 355篇 |
2015年 | 404篇 |
2014年 | 601篇 |
2013年 | 961篇 |
2012年 | 1385篇 |
2011年 | 1385篇 |
2010年 | 767篇 |
2009年 | 750篇 |
2008年 | 1353篇 |
2007年 | 1332篇 |
2006年 | 1333篇 |
2005年 | 1366篇 |
2004年 | 1306篇 |
2003年 | 1280篇 |
2002年 | 1239篇 |
2001年 | 150篇 |
2000年 | 131篇 |
1999年 | 167篇 |
1998年 | 251篇 |
1997年 | 219篇 |
1996年 | 180篇 |
1995年 | 191篇 |
1994年 | 169篇 |
1993年 | 164篇 |
1992年 | 136篇 |
1991年 | 117篇 |
1990年 | 107篇 |
1989年 | 110篇 |
1988年 | 105篇 |
1987年 | 107篇 |
1986年 | 76篇 |
1985年 | 82篇 |
1984年 | 117篇 |
1983年 | 89篇 |
1982年 | 125篇 |
1981年 | 103篇 |
1980年 | 106篇 |
1979年 | 57篇 |
1978年 | 65篇 |
1977年 | 43篇 |
1976年 | 49篇 |
1975年 | 30篇 |
1974年 | 38篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
42.
43.
Celeste A. Lemay Suzanne B. Cashman Judith A. Savageau Patricia A. Reidy 《Journal of nursing scholarship》2004,36(4):312-315
PURPOSE: Evaluate the effectiveness of body mass index (BMI) tables placed in exam rooms as an intervention to encourage providers to calculate and record BMI scores in patients' medical records. DESIGN: In a prospective cohort design, medical record data for 276 adult patients at a federally funded community health center in New England were examined from August 2000 to August 2002 following the intervention. METHODS: Prominent, multicolored, laminated BMI tables were posted in the exam rooms of one of the study site's three primary health care teams. Medical record data collected included documentation of BMI calculation in medical records, documentation of an obesity diagnosis, and inclusion of heights and current weights. Frequency distributions were calculated; chi-square tests were used to identify associations. FINDINGS: In contrast to the comparison teams, patients on the intervention team were more likely to have BMI recorded in the medical record. A statistically significant increase in the diagnosis of obesity was observed throughout the health center after the intervention. CONCLUSIONS: Posting BMI tables in exam rooms contributed to increased BMI documentation in patients' medical records. 相似文献
44.
Giedd Jay N.; Snell John W.; Lange Nicholas; Rajapakse Jagath C.; Casey B. J.; Kozuch Patricia L.; Vaituzis A. Catherine; Vauss Yolanda C.; Hamburger Susan D.; Kaysen Debra; Rapoport Judith L. 《Cerebral cortex (New York, N.Y. : 1991)》1996,6(4):551-559
Brain magnetic resonance images (MRI) of 104 healthy childrenand adolescents, aged 418, showed significant effectsof age and gender on brain morphometry. Males had larger cerebral(9%) and cerebellar (8%) volumes (P < 0.0001 and P = 0.008.respectively), which remained significant even after correctionfor height and weight After adjusting for cerebral size, theputamen and globus pallidus remained larger in males, whilerelative caudate size was larger in females. Neither cerebralnor cerebellar volume changed significantly across this agerange. Lateral ventricular volume increased significantly inmales (trend for females), with males showing an increase inslope after age 11. In males only, caudate and putamen decreasedwith age (P = 0.007 and 0.05, respectively). The left lateralventricles and putamen were significantly greater than the rightP = 0.01 and 0.0001, respectively). In contrast, the cerebralhemispheres and caudate showed a highly consistent right greater-than-leftasymmetry (P < 0.0001 for both). All volumes demonstrateda high degree of variability. These findings highlight gender-specificmaturational changes of the developing brain and the need forlarge gender-matched samples in pediatric neuropsychiatric studies. 相似文献
45.
Critical care nurses, ethical decision-making and stress 总被引:2,自引:0,他引:2
Considerable attention has focused on describing ethical issues that critical care nurses face in their practice; however, less attention has been directed at describing the process of ethical decision-making. Systematic research linking aspects of ethical-decision making and stress is lacking. This cross-sectional study examines the relationship between selected aspects of ethical decision-making, stress and selected nurse characteristics. Sixty-one critical care nurses completed the Nurse's Ethical Decision Making—ICU Questionnaire and the Health Professions Stress Inventory. Findings revealed that nurses who selected the patient advocacy model had significantly higher nurse autonomy scores, that perceived anxiety had a negative association with nurse autonomy, and that workplace restrictions and stress were related. 相似文献
46.
47.
INTRODUCTION: Farming is a dangerous occupation and results in injuries not only to farm workers, but also to families living on farms. Children raised on a farm are at particular risk because the farm is a place where they live, play, and work. Farming is the main Amish occupation, and because Amish farming techniques differ from those used on other us farms, it is important that health care providers recognize the causes of injuries that may occur on Amish farms. However, little is documented about farm-related injuries in Amish children, so we decided to document the incidence and nature of these injuries in Pennsylvania. METHODS: This study was done by reviewing the die botschaft, a weekly newspaper written by the Amish. All references to farm-related injuries among children in Pennsylvania were recorded. RESULTS: During a 5-month period, a total of 89 injuries, including 5 fatalities, were found: male children sustained 64 injuries, and female children sustained 25 injuries. Falls were the most commonly reported mechanism of injury, followed by incidents involving livestock. Both types of events most often resulted in an orthopedic injury. DISCUSSION: Injury to children in the Amish community is a significant problem that needs to be addressed and evaluated by the Amish themselves and in coordination with other health care providers, including emergency nurses. With the information obtained in this study, injury prevention strategies tailored to the Amish way of farming could be developed and implemented. 相似文献
48.
49.
50.
Job ending among youth and adults with severe mental illness 总被引:1,自引:0,他引:1
This study examined job leaving over a 36-month period among 326 persons (74 youth and 252 adults) with severe mental illness who were participating in an urban vocational rehabilitation program. Data from 627 job endings indicated that younger clients displayed job-ending patterns that were different in some aspects from such patterns for nondisabled youth (such as displaying a lower average job tenure) yet similar to job-ending patterns for nonhandicapped youth in other ways (such as displaying a high frequency of job changing). Youth and their adult counterparts with mental illness displayed similar tenure on agency-sponsored placements but significantly different tenure on independent jobs. While adults held their independent jobs for an average of seven months, youth averaged only three months at competitive employment. Youth also were significantly more likely than adults to be fired from both placements and independent jobs. These findings and others are discussed in terms of their implications for development of public policy and service delivery models for providing on-going job support to youth and adults with severe psychiatric disabilities. 相似文献