全文获取类型
收费全文 | 212181篇 |
免费 | 2773篇 |
国内免费 | 180篇 |
专业分类
耳鼻咽喉 | 1425篇 |
儿科学 | 7305篇 |
妇产科学 | 3603篇 |
基础医学 | 21223篇 |
口腔科学 | 2508篇 |
临床医学 | 14783篇 |
内科学 | 39859篇 |
皮肤病学 | 1253篇 |
神经病学 | 19095篇 |
特种医学 | 10171篇 |
外科学 | 35647篇 |
综合类 | 2480篇 |
预防医学 | 19267篇 |
眼科学 | 3160篇 |
药学 | 12176篇 |
中国医学 | 752篇 |
肿瘤学 | 20427篇 |
出版年
2023年 | 192篇 |
2022年 | 368篇 |
2021年 | 684篇 |
2020年 | 396篇 |
2019年 | 547篇 |
2018年 | 22486篇 |
2017年 | 17778篇 |
2016年 | 19993篇 |
2015年 | 1563篇 |
2014年 | 1649篇 |
2013年 | 1746篇 |
2012年 | 8489篇 |
2011年 | 22553篇 |
2010年 | 19682篇 |
2009年 | 12219篇 |
2008年 | 20844篇 |
2007年 | 23130篇 |
2006年 | 2098篇 |
2005年 | 3776篇 |
2004年 | 4977篇 |
2003年 | 5863篇 |
2002年 | 4045篇 |
2001年 | 1914篇 |
2000年 | 2005篇 |
1999年 | 1689篇 |
1998年 | 730篇 |
1997年 | 637篇 |
1996年 | 470篇 |
1995年 | 436篇 |
1994年 | 425篇 |
1993年 | 347篇 |
1992年 | 1024篇 |
1991年 | 1009篇 |
1990年 | 930篇 |
1989年 | 971篇 |
1988年 | 822篇 |
1987年 | 736篇 |
1986年 | 763篇 |
1985年 | 705篇 |
1984年 | 449篇 |
1983年 | 394篇 |
1982年 | 215篇 |
1981年 | 185篇 |
1979年 | 311篇 |
1978年 | 247篇 |
1977年 | 211篇 |
1975年 | 214篇 |
1974年 | 204篇 |
1971年 | 176篇 |
1969年 | 185篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
Chad G. Ball Andrew W. Kirkpatrick Matthew Smith Robert H. Mulloy Leonard Tse Ian B. Anderson 《European journal of trauma and emergency surgery》2007,33(5):550-552
Abstract We report a case of SMV injury in a critically ill patient. The patient was a 19-year-old woman involved in a motor vehicle
collision. Her injuries included grade II splenic and renal lacerations, devascularized and lacerated right and transverse
colon, a transected transverse mesocolon, a massive shear injury of her abdominal wall, and two partial SMV transections.
At initial damage control laparotomy, the SMV was ligated, the devascularized bowel resected and a temporary abdominal closure
applied. At re-operation, a mesocaval shunt using saphenous vein was employed. The shunt failed and the patient required a
saphenous vein jump graft. Although visceral vascular injuries are rare, ligation of the SMV in a damage control situation
is acceptable. This case study is the first to discuss appropriate treatment when interruption to a patient's collateral visceral
venous drainage limits the surgeon’s ability to ligate. In these situations, bypass shunts may be successful. 相似文献
73.
Henry Cisneros 《AIDS and behavior》2007,11(2):7-8
For persons battling HIV/AIDS a stable place to live may decide the length and quality of life itself. It is nearly impossible for a person on the streets to engage in a needed continuous AIDS treatment regimen when the very basic question of where that person will rest his or her head when darkness comes in just a few hours is unresolved. When danger lurks on the streets, when cold numbs the limbs, when tiredness overwhelms the mind, when fear breaks the spirit, a place to call home would make all the difference. 相似文献
74.
75.
Christian Waydhas Dieter Nast-Kolb Steffen Ruchholtz 《European journal of trauma and emergency surgery》2007,33(2):170-175
Abstract
Objective: To define the diagnostic accuracy of clinical examination in patients with impaired consciousness or endotracheal intubation
to detect pelvic ring fractures and to identify those with severe bleeding.
Methods: Included in this prospective data collection with retrolective data analysis were a consecutive series of blunt trauma victims
with either a Glasgow Coma Scale ≤ 13 or tracheal intubation. Clinical examination comprised testing for stability of the
iliac wings.
Results: From 784 subjects (injury severity score 23.3 ± 17.4) 93 patients (11.9%) were found to have a pelvic ring fracture. Clinical
instability of the pelvic ring was found in 42 patients. There was only one false positive. Fifty-two fractures could not
be identified by clinical examination, including nine fractures (17%) that required surgical fracture stabilization (sensitivity
of clinical examination 44.1%). Seventeen fractures (18.3%) were associated with a blood loss larger than 20% of circulating
blood volume. Sixteen of those were identified by clinical instability of the pelvic ring (sensitivity 94.1%, specificity
97.0%, positive predictive value 38.1%, negative predictive value 99.9%).
Conclusions: Clinical examination for stability of the pelvis in this selected group of patients missed a significant number of pelvic
ring fractures including fractures that require surgical stabilization. The finding of a clinically unstable identifies most
of the patients with the pelvic ring fracture being a major source of bleeding. A stable pelvis makes pelvic ring fracture
as being the source of bleeding quite unlikely. 相似文献
76.
Background
Reports on childhood cancer survivors estimated cumulative probability of developing secondary neoplasms vary from 3,3% to 25% at 25 years from diagnosis, and the risk of developing another cancer to several times greater than in the general population. 相似文献77.
Tatsurou Tanaka Yasuhiro Morimoto Hiroshi Takano Kazuhiro Tominaga Shinji Kito Sachiko Okabe Tetsu Takahashi Jin-ichi Fukuda Takeshi Ohba 《Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics》2005,100(5):609-613
OBJECTIVE: To evaluate a proposed technique for the 3-dimensional (3D) detection of hemangiomas, including vascular malformation and their feeding arteries, in the head and neck. The new technique combines phase-contrast magnetic resonance angiography (PCMRA) without contrast medium and 3D fast asymmetric spin-echo (FASE) sequences. METHODS: The technique was applied to 3 patients having hemangiomas in the head and neck region. In 1 patient the image obtained with the proposed technique was compared to that obtained by standard contrast angiography. RESULTS: In all 3 patients, the 3D presence of the hemangiomas and the feeding arteries were well defined in images created by the proposed technique. Additionally, the characterization of the hemangioma's 3D structure and distribution of the feeding arteries coincided with those observed using contrast angiography in the case for which contrast angiography was also performed. CONCLUSIONS: Preliminary experience shows that the proposed technique combining 3D-FASE and 3D-PCMRA is useful to visualize both the 3D structure of hemangiomas and to identify the 3D distribution of the feeding arteries without using contrast medium. 相似文献
78.
79.
Birgitta Malmberg Göran Kecklund Björn Karlson Roger Persson Per Flisberg Palle Ørbaek 《BMC health services research》2010,10(1):239
Background
It is well known that physicians' night-call duty may cause impaired performance and adverse effects on subjective health, but there is limited knowledge about effects on sleep duration and recovery time. In recent years occupational stress and impaired well-being among anaesthesiologists have been frequently reported for in the scientific literature. Given their main focus on handling patients with life-threatening conditions, when on call, one might expect sleep and recovery to be negatively affected by work, especially in this specialist group. The aim of the present study was to examine whether a 16-hour night-call schedule allowed for sufficient recovery in anaesthesiologists compared with other physician specialists handling less life-threatening conditions, when on call. 相似文献80.
David Berrigan Linda W Pickle Jennifer Dill 《International journal of health geographics》2010,9(1):20