全文获取类型
收费全文 | 21738篇 |
免费 | 5632篇 |
国内免费 | 126篇 |
专业分类
耳鼻咽喉 | 633篇 |
儿科学 | 638篇 |
妇产科学 | 699篇 |
基础医学 | 368篇 |
口腔科学 | 2667篇 |
临床医学 | 4173篇 |
内科学 | 5093篇 |
皮肤病学 | 473篇 |
神经病学 | 1836篇 |
特种医学 | 990篇 |
外科学 | 3842篇 |
综合类 | 91篇 |
现状与发展 | 12篇 |
预防医学 | 2727篇 |
眼科学 | 347篇 |
药学 | 298篇 |
中国医学 | 18篇 |
肿瘤学 | 2591篇 |
出版年
2024年 | 163篇 |
2023年 | 1091篇 |
2022年 | 375篇 |
2021年 | 652篇 |
2020年 | 1228篇 |
2019年 | 495篇 |
2018年 | 1344篇 |
2017年 | 1295篇 |
2016年 | 1525篇 |
2015年 | 1571篇 |
2014年 | 1975篇 |
2013年 | 2397篇 |
2012年 | 821篇 |
2011年 | 753篇 |
2010年 | 1367篇 |
2009年 | 1951篇 |
2008年 | 752篇 |
2007年 | 512篇 |
2006年 | 652篇 |
2005年 | 459篇 |
2004年 | 327篇 |
2003年 | 291篇 |
2002年 | 259篇 |
2001年 | 397篇 |
2000年 | 288篇 |
1999年 | 385篇 |
1998年 | 500篇 |
1997年 | 480篇 |
1996年 | 532篇 |
1995年 | 388篇 |
1994年 | 299篇 |
1993年 | 260篇 |
1992年 | 175篇 |
1991年 | 159篇 |
1990年 | 139篇 |
1989年 | 141篇 |
1988年 | 123篇 |
1987年 | 122篇 |
1986年 | 101篇 |
1985年 | 94篇 |
1984年 | 84篇 |
1983年 | 90篇 |
1982年 | 82篇 |
1981年 | 67篇 |
1980年 | 45篇 |
1979年 | 34篇 |
1978年 | 37篇 |
1977年 | 45篇 |
1976年 | 36篇 |
1975年 | 29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.
6.
The intention of this article is to introduce the reader to the Transograph from a historical perspective. The technical data presented are intended to help the reader understand the design of this unique instrument and how it was programmed, but will not provide the reader a thorough understanding of this philosophy. The article seeks neither to defend nor criticize the principles of Transographics. 相似文献
7.
8.
9.
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
10.
Theodore C. Bania MD MS Tom Ashar MD Gregory Press MD Patricia M. Carey MD 《Academic emergency medicine》2003,10(7):697-704
Long-term daily use of gamma-hydroxybutyrate (GHB) and related compounds has recently been associated with a withdrawal syndrome. To the best of the authors' knowledge, there are currently no animal models of GHB withdrawal. OBJECTIVES: The authors studied and described the effect of chronic dosing of GHB (3-6 days) on tolerance and withdrawal in a rat model. METHODS: Rats were administered GHB every three hours via intraperitoneal catheter. Groups of rats (2 per group) were dosed with GHB for either 3 (24 doses), 4 (32 doses), 5 (40 doses), or 6 (48 doses) days. The GHB dose was 0.25 g/kg for doses 1-8, 0.75 g/kg for doses 9-12, 1 g/kg for doses 13-16, 1.25 g/kg for doses 17-24, 1.5 g/kg for doses 25-32, 1.75 g/kg for doses 33-40, and 2 g/kg for doses 41-48. Following the last dose of GHB, the rats were scored using a 16-point ethanol intoxication-withdrawal scale rating spontaneous behaviors, response to handling, grooming, and neurological signs. Lower scores indicate intoxication, while higher scores indicate withdrawal. Scores were recorded at hours 0, 1, 2, 3, 4, 5, 6, 9, 12, and 24. RESULTS: Tolerance: Rats dosed with GHB for more days were less intoxicated one hour after their last GHB dose despite receiving higher doses. WITHDRAWAL: The scores for all rats dosed with GHB increased at hours 4 (p = 0.028), 5 (p = 0.037), 6 (p = 0.007), and 9 (p = 0.024) after the last dose, indicating withdrawal. The scores demonstrated a linear increase dependent upon the number of days of GHB dosing at hours 3 (p < 0.000), 4 (p = 0.004), 5 (p = 0.002), and 12 (p = 0.039) as well as prior to the last dose at hour 0 (p = 0.000). No rats developed seizures. CONCLUSIONS: Tolerance and mild withdrawal in rats can be induced by administering intraperitoneal GHB every three hours for 3-6 days. More prolonged dosing and higher doses of GHB may be necessary to induce severe withdrawal. 相似文献