全文获取类型
收费全文 | 26607篇 |
免费 | 5865篇 |
国内免费 | 146篇 |
学科分类
医药卫生 | 32618篇 |
出版年
2024年 | 164篇 |
2023年 | 1125篇 |
2022年 | 467篇 |
2021年 | 831篇 |
2020年 | 1312篇 |
2019年 | 613篇 |
2018年 | 1475篇 |
2017年 | 1395篇 |
2016年 | 1659篇 |
2015年 | 1735篇 |
2014年 | 2209篇 |
2013年 | 2712篇 |
2012年 | 1263篇 |
2011年 | 1220篇 |
2010年 | 1614篇 |
2009年 | 2172篇 |
2008年 | 1099篇 |
2007年 | 873篇 |
2006年 | 992篇 |
2005年 | 757篇 |
2004年 | 619篇 |
2003年 | 506篇 |
2002年 | 415篇 |
2001年 | 410篇 |
2000年 | 302篇 |
1999年 | 402篇 |
1998年 | 523篇 |
1997年 | 507篇 |
1996年 | 549篇 |
1995年 | 404篇 |
1994年 | 314篇 |
1993年 | 276篇 |
1992年 | 176篇 |
1991年 | 158篇 |
1990年 | 147篇 |
1989年 | 147篇 |
1988年 | 126篇 |
1987年 | 126篇 |
1986年 | 99篇 |
1985年 | 97篇 |
1984年 | 76篇 |
1983年 | 90篇 |
1982年 | 85篇 |
1981年 | 67篇 |
1980年 | 46篇 |
1979年 | 32篇 |
1978年 | 32篇 |
1977年 | 43篇 |
1976年 | 31篇 |
1975年 | 27篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
Chie Teramoto PHN RN MS Satoko Nagata PhD PHN RN Reiko Okamoto PhD PHN RN Ruriko Suzuki PHN RN MS Emiko Kishi PhD PHN RN Michie Nomura DSN PHN RN Noriko Jojima PHN RN MS Masumi Nishida PhD PHN RN Keiko Koide PhD PHN RN Emiko Kusano PhD PHN RN Saori Iwamoto PhD PHN RN Sachiyo Murashima PhD PHN RN 《Public health nursing (Boston, Mass.)》2015,32(6):654-661
3.
4.
5.
Rajesh Bhat Alison Severn Sam Chakraverty 《Nephrology, dialysis, transplantation》2006,21(9):2642-2643
Placement of tunnelled dialysis lines is effective using ultrasoundand fluoroscopic guidance [1] and has a higher success ratethan blind insertion [2]. After the ultrasound guided access into a neck vein, wires andcatheters are guided in to a suitable position in the 相似文献
6.
7.
8.
Lisa A. Lang DDS MS David C. Holmes DDS MS Craig Passon DDS MS Robert M. Trombly DDS JD Jeffrey D. Astroth DDS MSPH Arnold F. Tavel DMD 《Journal of prosthodontics》2003,12(3):206-210
Using complete denture treatment as an introduction to clinical patient care for dental students, the purposes of the Complete Denture Prosthodontics Transition Clinic at the University of Colorado School of Dentistry are to reduce the time lapse between the preclinical complete denture prosthodontics course and the first denture patient experience, and to encourage development of student self-confidence and skills. In the 2002 spring semester, faculty at the University of Colorado School of Dentistry initiated the Complete Denture Prosthodontics Transition Clinic for DS-II (second-year) dental students, as an introduction to clinical patient care. Each patient was assigned to a team of two dental students. Three Division of Prosthodontics faculty members staffed each clinic session, providing a student-to-faculty ratio of approximately 6.6:1 and a patient-to-faculty ratio of approximately 3.3:1. All DS-II students in the Class of 2004 delivered their first complete dentures no later than 8 months (average, 184 days) after the last day of the preclinical complete denture prosthodontics course. The time from the diagnostic appointment through the denture placement appointment averaged 39 days for patients treated in this program, compared with an average of 98 days or more for previous classes. The program was successful in achieving the goal of reducing the time lapse between the preclinical complete denture prosthodontics course and the first denture patient experience. 相似文献
9.
Ajay Punpale C S Pramesh Nirmala Jambhekar Rajesh C Mistry 《Annals of thoracic and cardiovascular surgery》2006,12(6):425-427
Liposarcomas are extremely rare in the mediastinum. They may achieve considerable size before causing any symptoms. Mediastinal liposarcomas may invade surrounding structures like the pericardium or the superior vena cava. Complete surgical excision is the optimal treatment in resectable cases. Excision of adjacent structures like the pericardium may be needed if the tumor infiltrates them. We report on a case of a giant liposarcoma of the mediastinum involving both hemithoraces and extending into the neck, which was successfully managed by complete surgical excision. 相似文献
10.