全文获取类型
收费全文 | 4842篇 |
免费 | 369篇 |
国内免费 | 29篇 |
专业分类
耳鼻咽喉 | 25篇 |
儿科学 | 142篇 |
妇产科学 | 87篇 |
基础医学 | 603篇 |
口腔科学 | 166篇 |
临床医学 | 452篇 |
内科学 | 1048篇 |
皮肤病学 | 81篇 |
神经病学 | 274篇 |
特种医学 | 136篇 |
外科学 | 776篇 |
综合类 | 279篇 |
一般理论 | 5篇 |
预防医学 | 392篇 |
眼科学 | 158篇 |
药学 | 292篇 |
中国医学 | 10篇 |
肿瘤学 | 314篇 |
出版年
2023年 | 43篇 |
2022年 | 94篇 |
2021年 | 170篇 |
2020年 | 110篇 |
2019年 | 136篇 |
2018年 | 136篇 |
2017年 | 116篇 |
2016年 | 125篇 |
2015年 | 118篇 |
2014年 | 148篇 |
2013年 | 184篇 |
2012年 | 313篇 |
2011年 | 288篇 |
2010年 | 165篇 |
2009年 | 168篇 |
2008年 | 218篇 |
2007年 | 240篇 |
2006年 | 230篇 |
2005年 | 220篇 |
2004年 | 185篇 |
2003年 | 188篇 |
2002年 | 165篇 |
2001年 | 141篇 |
2000年 | 150篇 |
1999年 | 123篇 |
1998年 | 75篇 |
1997年 | 56篇 |
1996年 | 41篇 |
1995年 | 47篇 |
1994年 | 31篇 |
1993年 | 28篇 |
1992年 | 55篇 |
1991年 | 61篇 |
1990年 | 69篇 |
1989年 | 62篇 |
1988年 | 48篇 |
1987年 | 52篇 |
1986年 | 46篇 |
1985年 | 40篇 |
1984年 | 30篇 |
1983年 | 25篇 |
1982年 | 33篇 |
1981年 | 28篇 |
1980年 | 28篇 |
1979年 | 30篇 |
1978年 | 23篇 |
1977年 | 24篇 |
1976年 | 22篇 |
1975年 | 20篇 |
1973年 | 19篇 |
排序方式: 共有5240条查询结果,搜索用时 15 毫秒
1.
2.
3.
Seok L Ong Gianpiero Gravante Cristina A Pollard M'Balu A Webb Severine Illouz Ashley R Dennison 《HPB : the official journal of the International Hepato Pancreato Biliary Association》2009,11(8):613-621
Pain control is one of the most challenging aspects in the management of chronic pancreatitis. Total pancreatectomy can successfully relieve the intractable abdominal pain in these patients but will inevitably result in insulin-dependent diabetes. Islet autotransplantation aims to preserve, as far as possible, the insulin secretory function of the islet cell mass thereby reducing (or even removing) the requirement for exogenous insulin administration after a total pancreactomy. Despite the relatively small number of centres able to perform these procedures, there are important technical variations in the details of their approaches. The aim of this review is to provide details of the current surgical practice for total pancreatectomy combined with islet autotransplantation, and outline the potential advantages and disadvantages of the variations adopted in each centre. 相似文献
4.
Rhythmic neurally mediated spontaneous contractions of the longitudinal muscle in the isolated ileum of the guinea pig, sensitive to tetrodotoxin and atropine, were depressed and most often abolished by the GABAA receptor antagonists, bicuculline methiodide, RU 5135, and picrotoxin, a Cl- -ionophore blocker, as well as by GABA desensitization. 3-Mercaptopropionic acid, known to prevent GABA release, also reduced these naturally occurring spontaneous contractions. All these strongly indicate a physiological involvement of endogenous GABA in the control of spontaneous rhythmic activity in the intestine. 相似文献
5.
Background
Health service policy in the United Kingdom emphasises the importance of self-care by patients with chronic conditions. Written information for patients about their condition is seen as an important aid to help patients look after themselves. From a discourse analysis perspective written texts such as patient information leaflets do not simply describe the reality of a medical condition and its management but by drawing on some sorts of knowledge and evidence rather than others help construct the reality of that condition. This study explored patient information leaflets on osteoarthritis (OA) to see how OA was constructed and to consider the implications for self-care. 相似文献6.
Eric Lim Ziad Ali Ayyaz Ali Reza Motalleb-Zadeh Christopher Jackson Seok Ling Ong James Halstead Linda Sharples Jayan Parameshwar John Wallwork Stephen R Large 《The Journal of heart and lung transplantation》2005,24(8):983-989
BACKGROUND: To ascertain survival of ischemic advanced heart failure patients by treatment allocation, we examined the outcome of transplant assessment patients allocated to medical therapy, high-risk conventional surgery, or transplantation. METHODS: Patients were identified from the Papworth transplant database and excluded if primary etiology was not ischemic. Grouping was undertaken according to treatment allocation at initial assessment, and analysis was performed by intention to treat. Survival was computed from the time of assessment and Cox regression used to stratify patients according risk with the Heart Failure Survival Score. RESULTS: From May 1993 to September 2001, a total of 755 patients were admitted for transplant assessment, with 348 (46.1%) identified as having heart failure of ischemic origin. Variables required for calculation of the Heart Failure Survival Score was available in 273 patients (78.4%), and 20 patients (7.3%) were lost to follow-up. Of the remaining 253 patients, 89 (35.2%) were allocated to medical therapy, 32 (12.6%) to surgery, and 132 (52.2%) to transplantation. The relative risk (95% confidence limit) of death compared with medical therapy was 0.62 (0.28, 1.40) for surgery and 0.38 (0.24, 0.61) for transplantation in medium- to high-risk patients. For low-risk patients, the relative risks for death compared with medical therapy were 1.87 (0.63, 5.60) for surgery and 1.97 (0.79, 4.96) for transplantation. CONCLUSIONS: Transplantation improved survival of medium- and high-risk patients compared with medical therapy. In the low-risk group, this was not evident. However, repeated assessment of risk is required because the hazard for death rises steadily after the third year in these patients. 相似文献
7.
A 50-year old Chinese woman with the rare neurological disorder of Choreoacanthocytosis is described. Her illness is characterised by seizures, buccolingual dyskinesia, choreiform movements, arreflexia and mild sensorimotor polyneuropathy. Acanthocytes were present in her peripheral blood in large numbers but the serum lipid profile was normal. Her features are consistent with those so far described in Caucasian and Japanese patients. The disease differs from Huntington's chorea in that there are acanthocytes, peripheral neuropathy, and metal function remains relatively intact. 相似文献
8.
9.
Dilatation and curettage (D+C) is the most common operation performed in Britain. The liberal use of D+C has been criticised.
The objective of this study was to evaluate the use of outpatient endometrial pipelle biopsy and determine its safety in terms
of detecting abnormalities. Complications and financial costs were also evaluated. Data were reviewed from an active gynaecological
unit from February 1993 to January 1995. A total of 303 D+Cs and 104 endometrial pipelle biopsies were performed in this period.
Nine malignancies were detected by D+C and 1 by pipelle biopsy. A total of 24 and 3 benign abnormalities were detected by
each method respectively. There was a higher complication rate in the D+C group but the failure rate was higher in the endometrial
pipelle biopsy group. The monetary savings over this period is estimated at £20,307. There were no missed malignancies to
our knowledge over the 8 yr period since endometrial pipelle biopsy was introduced to the hospital. 相似文献
10.