全文获取类型
收费全文 | 23345篇 |
免费 | 1733篇 |
国内免费 | 82篇 |
专业分类
耳鼻咽喉 | 231篇 |
儿科学 | 950篇 |
妇产科学 | 616篇 |
基础医学 | 3119篇 |
口腔科学 | 687篇 |
临床医学 | 2714篇 |
内科学 | 4534篇 |
皮肤病学 | 337篇 |
神经病学 | 1851篇 |
特种医学 | 1026篇 |
外科学 | 3132篇 |
综合类 | 400篇 |
一般理论 | 43篇 |
预防医学 | 2193篇 |
眼科学 | 354篇 |
药学 | 1446篇 |
2篇 | |
中国医学 | 25篇 |
肿瘤学 | 1500篇 |
出版年
2022年 | 142篇 |
2021年 | 336篇 |
2020年 | 236篇 |
2019年 | 367篇 |
2018年 | 416篇 |
2017年 | 349篇 |
2016年 | 355篇 |
2015年 | 444篇 |
2014年 | 609篇 |
2013年 | 798篇 |
2012年 | 1127篇 |
2011年 | 1231篇 |
2010年 | 684篇 |
2009年 | 610篇 |
2008年 | 1103篇 |
2007年 | 1215篇 |
2006年 | 1108篇 |
2005年 | 1104篇 |
2004年 | 959篇 |
2003年 | 954篇 |
2002年 | 818篇 |
2001年 | 655篇 |
2000年 | 639篇 |
1999年 | 540篇 |
1998年 | 305篇 |
1997年 | 281篇 |
1996年 | 261篇 |
1995年 | 265篇 |
1994年 | 231篇 |
1993年 | 216篇 |
1992年 | 482篇 |
1991年 | 463篇 |
1990年 | 445篇 |
1989年 | 455篇 |
1988年 | 416篇 |
1987年 | 380篇 |
1986年 | 318篇 |
1985年 | 393篇 |
1984年 | 298篇 |
1983年 | 272篇 |
1982年 | 170篇 |
1979年 | 212篇 |
1978年 | 187篇 |
1977年 | 161篇 |
1976年 | 151篇 |
1975年 | 159篇 |
1974年 | 158篇 |
1973年 | 198篇 |
1972年 | 160篇 |
1971年 | 142篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
M Nelson 《Respiratory management》1988,18(4):29-32
By focusing on quality of life through education and ongoing support, the pulmonary rehabilitation staff at Little Company of Mary Hospital in Torrance, Calif, gives hope to respiratory patients and teaches them to become partners in the management of their disease. 相似文献
62.
Joanna Ochocka Geoffrey Nelson Rich Janzen John Trainor 《Journal of community psychology》2006,34(3):273-283
This article examines the outcomes of participation in mental health Consumer/Survivor Initiatives (CSIs) and identifies helpful qualities of CSIs through a longitudinal, qualitative study that involved in‐depth interviews of people who experienced severe mental health challenges in Ontario, Canada. We used a nonequivalent control group design in which we compared active participants in CSIs ( n = 15) with nonactive participants ( n = 12) at baseline and at 9‐ and 18‐month follow‐up intervals. Compared with non‐CSI participants, CSI participants reported more stable mental health, enhanced social support, sustained work, stable income, and participation in education and training at 9‐ and 18‐month interviews. The helpful qualities of CSIs that participants reported were (1) safe environments that provide a positive, welcoming place to go; (2) social arenas that provide opportunities to meet and talk with peers; (3) an alternative worldview that provides opportunities for members to participate and contribute; and (4) effective facilitators of community integration that provide opportunities to connect members to the community at large. The findings are discussed in terms of previous research in self‐help and consumer‐run organizations in mental health. © 2006 Wiley Periodicals, Inc. 相似文献
63.
64.
Vertebral fracture or vertebral deformity? 总被引:3,自引:0,他引:3
65.
66.
67.
Anaesthetic agents decrease the activity of nitric oxide synthase from human polymorphonuclear leucocytes 总被引:11,自引:1,他引:10
Nitric oxide (NO) inhibitors reduce the threshold for anaesthesia. We have
investigated the action of anaesthetic agents on human nitric oxide
synthase (NOS) activity. Thiopentone reduced mean NOS activity to 36.6 (SD
8.9) % of control at 100 mumol litre-1 (P < 0.001) and 50.9 (20.3) % at
1 mmol litre-1 (P < 0.05). Ketamine showed similar effects, with
activity reduced to 67.0 (17.6) % (P < 0.05) and 57.7 (8.5) % (P <
0.001) at 100 mumol litre-1 and 1 mmol litre-1, respectively. Etomidate 100
mumol litre-1 did not significantly alter activity (88.2 (8.1) %) but 1
mmol litre-1 did (60.6 (10.4) %, P < 0.005). Halothane also caused a
significant decrease in NOS activity at all concentrations. This effect was
specific as other enzymes were unaffected. We conclude that anaesthetic
agents have a profound effect on NOS activity and as inhibition of NO
release augments anaesthesia, we suggest that this may play a role in the
mechanism of anaesthesia in humans.
相似文献
68.
James F. Jekel David F. Allen Nelson Clarke Henry Podlewski Hannah Gray Carolyn Roberts 《The American journal on addictions / American Academy of Psychiatrists in Alcoholism and Addictions》1994,3(1):14-24
Nine years after the beginning of the epidemic of freebase (crack) cocaine abuse in the Bahamas, this historical study was done to characterize the natural course of the epidemic and to estimate the effectiveness of control measures. The authors' data include the incidence of new cases at the only psychiatric hospital in the Bahamas and at the primary community psychiatric clinic in the nation. The Bahamian response included 1) demand reduction, 2) supply reduction, and 3) reduction of money laundering. The annual number of new cases of crack abuse presenting for treatment declined from 1987 to mid-1991 in both facilities, but in 1992 it began rising again in the inpatient setting only. The changes in recent years have been accompanied by an increase in violent crimes against persons, especially robberies. (American Journal on Addictions 1994; 3:14–24) 相似文献
69.
J Nelson 《Canadian Medical Association journal》1988,138(10):888-889
70.