全文获取类型
收费全文 | 127707篇 |
免费 | 10171篇 |
国内免费 | 4027篇 |
专业分类
耳鼻咽喉 | 1245篇 |
儿科学 | 7538篇 |
妇产科学 | 3914篇 |
基础医学 | 14194篇 |
口腔科学 | 1600篇 |
临床医学 | 13929篇 |
内科学 | 24456篇 |
皮肤病学 | 2429篇 |
神经病学 | 10621篇 |
特种医学 | 2937篇 |
外国民族医学 | 4篇 |
外科学 | 12325篇 |
综合类 | 17587篇 |
现状与发展 | 16篇 |
预防医学 | 7113篇 |
眼科学 | 2186篇 |
药学 | 6599篇 |
55篇 | |
中国医学 | 11080篇 |
肿瘤学 | 2077篇 |
出版年
2024年 | 234篇 |
2023年 | 2312篇 |
2022年 | 3529篇 |
2021年 | 6234篇 |
2020年 | 5836篇 |
2019年 | 4712篇 |
2018年 | 4697篇 |
2017年 | 4786篇 |
2016年 | 4919篇 |
2015年 | 4672篇 |
2014年 | 9050篇 |
2013年 | 9462篇 |
2012年 | 7208篇 |
2011年 | 8398篇 |
2010年 | 6481篇 |
2009年 | 6308篇 |
2008年 | 6239篇 |
2007年 | 6337篇 |
2006年 | 5686篇 |
2005年 | 4661篇 |
2004年 | 3969篇 |
2003年 | 3524篇 |
2002年 | 2452篇 |
2001年 | 2235篇 |
2000年 | 1925篇 |
1999年 | 1781篇 |
1998年 | 1484篇 |
1997年 | 1377篇 |
1996年 | 1071篇 |
1995年 | 1266篇 |
1994年 | 1091篇 |
1993年 | 987篇 |
1992年 | 875篇 |
1991年 | 680篇 |
1990年 | 617篇 |
1989年 | 527篇 |
1988年 | 520篇 |
1987年 | 470篇 |
1986年 | 408篇 |
1985年 | 517篇 |
1984年 | 436篇 |
1983年 | 268篇 |
1982年 | 357篇 |
1981年 | 315篇 |
1980年 | 255篇 |
1979年 | 211篇 |
1978年 | 135篇 |
1977年 | 108篇 |
1976年 | 93篇 |
1975年 | 41篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
81.
经脉包括经(气)络和血(脉)络,清代周学海《读医随笔》将气络末端称为"气之细络",脉络末端称为"血之细络"。心之气络涵盖心脏起搏与传导系统等广泛调控机制,心之脉络涵盖冠状动脉循环系统,心之气络与脉络相互协调,营卫相偕而行,共同维持心脏正常功能。各种致病因素导致营卫异常而发为心律失常,基于脉络学说营卫理论"损其心者,调其营卫"(《难经·十四难》)治疗原则指导心律失常辨证论治,同时充分结合现代致病因素和致病特点,分别选用调节卫气营血之方药,标本兼治,以期为临床诊疗提供有益借鉴。 相似文献
82.
83.
84.
85.
86.
87.
《Gastroenterologia y hepatologia》2019,42(10):604-613
IntroductionSunlight exposure is the main source of vitamin D. Our aim was to describe both sun exposure and sun protection behaviour in a series of patients with inflammatory bowel disease (IBD), and to study their potential association with vitamin D concentration.Patients and methodsA cross sectional, observational study. The clinical-demographic variables were obtained via clinical interviews and medical history review. The sunlight exposure assessment was carried out using the Sun Exposure Questionnaire and the concentration of 25-hydroxy vitamin D (25OHD) was measured by an electro-chemiluminescence immunoassay. Questionnaires were conducted on quality of life, physical activity, weekly vitamin D intake and sun protection behaviour.Results149 patients were included. In 69% of patients, deficient or insufficient 25OHD values were recorded. 67% showed low sun exposure. A modest significant correlation was observed between the total score of the solar exposure questionnaire and the 25OHD concentration in the complete series (r = 0.226, P = .006) and in the summer (r = 0.274, P = .01). The sun protection behaviour questionnaire score did not influence the 25OHD concentration. In the multivariate analysis, only the presence of clinical activity was associated with low sun exposure (OR = 3.23).DiscussionSun exposure according to the questionnaire used was low, was associated with the presence of clinical activity and was weakly correlated with serum 25OHD concentration. More studies are needed to explore the use of individual questionnaires for sun exposure and its relationship with vitamin D in patients with IBD. 相似文献
88.
89.
《Asian journal of surgery / Asian Surgical Association》2021,44(8):1037-1042
BackgroundStoma-related obstruction (SRO) is defined as small bowel obstruction occurring around the limbs of diverting ileostomy (DI). This study was aimed to investigate the incidence, risk factors, and management of SRO after laparoscopic colorectal surgery with DI creation.MethodsThis study included 155 patients who underwent laparoscopic colorectal surgery with DI creation for rectal cancer (n = 138), ulcerative colitis (UC) (n = 14), and familial adenomatous polyposis (FAP) (n = 3) between 2011 and 2019. Univariate and multivariate analyses were performed to identify the risk factors of SRO.ResultsThe incidence of SRO was 7.7% (n = 12), and it was significantly lower (P < 0.01) in patients with lower anterior resection or intersphincteric resection (4.3%) than in those with ileal-pouch anal anastomosis (IPAA) (35.2%). The multivariate analysis revealed that IPAA was independently associated with the development of SRO (P = 0.001; odds ratio, 9.4; 95% confidence interval, 2.5–35.4). Eleven of 12 patients (92%) with SRO required trans-stomal tube decompression, and 8 of those (67%) underwent early stoma closure.ConclusionIPAA was an independent risk factor of SRO in laparoscopic colorectal surgery with DI creation. Early stoma closure was needed in most cases of SRO. 相似文献
90.
BackgroundPercutaneous endoscopic gastrostomy (PEG) is required for Levodopa/Carbidopa Intestinal Gel (LCIG) delivery in patients with advanced Parkinson's disease (PD) as well as for enteral feeding in a variety of neurological disorders. Buried Bumper Syndrome (BBS) is a serious complication of PEG. The frequency of BBS in patients receiving LCIG treatment has never been reported.ObjectivesTo compare the frequency of BBS in patients on LCIG treatment or on enteral feeding over the past 12 years and identify possible risk factors.MethodsWe reviewed prospectively recorded data from 2009 to 2020 on two case-series: LCIG-treated PD patients and non-PD patients on enteral nutrition. We identified all BBS incidences. Patients’ characteristics, clinical manifestations, BBS management, possible risk factors and outcomes were analyzed.ResultsDuring the 12 years, 35 PD patients underwent PEG insertion for LCIG infusion, and 123 non-PD patients for nutritional support. There were eight cases of BBS in six PD patients (17.1%). Six of them were effectively managed without treatment discontinuation. Of the enteral feeding patients, only one developed BBS (0.8%) (p < 0.001). We identified inappropriate PEG site aftercare, weight gain, early onset PD, longer survival, treatment duration, dementia and PEG system design as potential risk factors for BBS development.ConclusionsBBS occurs more frequently in LCIG patients than in patients receiving enteral feeding. If detected early, it can be successfully managed, and serious sequalae or treatment discontinuation can be avoided. Regular endoscopic follow-up visits of LCIG-treated patients and increased awareness in patients and clinicians are recommended. 相似文献