全文获取类型
收费全文 | 15985篇 |
免费 | 1120篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 94篇 |
儿科学 | 518篇 |
妇产科学 | 389篇 |
基础医学 | 2116篇 |
口腔科学 | 83篇 |
临床医学 | 2280篇 |
内科学 | 3222篇 |
皮肤病学 | 188篇 |
神经病学 | 1439篇 |
特种医学 | 339篇 |
外科学 | 1451篇 |
综合类 | 200篇 |
一般理论 | 18篇 |
预防医学 | 2149篇 |
眼科学 | 205篇 |
药学 | 1072篇 |
中国医学 | 15篇 |
肿瘤学 | 1351篇 |
出版年
2023年 | 101篇 |
2022年 | 163篇 |
2021年 | 360篇 |
2020年 | 228篇 |
2019年 | 391篇 |
2018年 | 421篇 |
2017年 | 320篇 |
2016年 | 357篇 |
2015年 | 413篇 |
2014年 | 543篇 |
2013年 | 840篇 |
2012年 | 1249篇 |
2011年 | 1232篇 |
2010年 | 639篇 |
2009年 | 611篇 |
2008年 | 994篇 |
2007年 | 1167篇 |
2006年 | 1084篇 |
2005年 | 1098篇 |
2004年 | 975篇 |
2003年 | 929篇 |
2002年 | 806篇 |
2001年 | 151篇 |
2000年 | 111篇 |
1999年 | 159篇 |
1998年 | 177篇 |
1997年 | 139篇 |
1996年 | 105篇 |
1995年 | 119篇 |
1994年 | 103篇 |
1993年 | 84篇 |
1992年 | 95篇 |
1991年 | 79篇 |
1990年 | 72篇 |
1989年 | 62篇 |
1988年 | 74篇 |
1987年 | 55篇 |
1986年 | 47篇 |
1985年 | 45篇 |
1984年 | 60篇 |
1983年 | 38篇 |
1982年 | 46篇 |
1981年 | 48篇 |
1980年 | 36篇 |
1979年 | 30篇 |
1978年 | 35篇 |
1976年 | 34篇 |
1975年 | 27篇 |
1974年 | 23篇 |
1971年 | 21篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
5.
6.
Suzanne Maman Lusajo Kajula Peter Balvanz Mrema Kilonzo Marta Mulawa Thespina Yamanis 《Global public health》2016,11(10):1202-1215
Gender inequality is at the core of the HIV patterns that are evident in sub-Saharan Africa. Gender-based violence (GBV) and lack of economic opportunity are important structural determinants of HIV risk. We piloted a microfinance and health promotion intervention among social networks of primarily young men in Dar es Salaam. Twenty-two individuals participated in the microfinance component and 30 peer leaders were recruited and trained in the peer health leadership component. We collected and analysed observational data from trainings, monitoring data on loan repayment, and reports of peer conversations to assess the feasibility and acceptability of the intervention. Eighteen of the loan recipients (82%) paid back their loans, and of these 15 (83%) received a second, larger loan. Among the loan defaulters, one died, one had chronic health problems, and two disappeared, one of whom was imprisoned for theft. The majority of conversations reported by peer health leaders focused on condoms, sexual partner selection, and HIV testing. Few peer leaders reported conversations about GBV. We demonstrated the feasibility and acceptability of this innovative HIV and GBV prevention intervention. The lessons learned from this pilot have informed the implementation of a cluster-randomised trial of the microfinance and peer health leadership intervention. 相似文献
7.
Anand Dayama Nikolaos Tsilimparis Stephen Kolakowski Nathaniel M. Matolo Misty D. Humphries 《Journal of vascular surgery》2019,69(1):156-163.e1
Background
Chronic limb-threatening ischemia (CLTI), defined as ischemic rest pain or tissue loss secondary to arterial insufficiency, is caused by multilevel arterial disease with frequent, severe infrageniculate disease. The rise in CLTI is in part the result of increasing worldwide prevalence of diabetes, renal insufficiency, and advanced aging of the population. The aim of this study was to compare a bypass-first with an endovascular-first revascularization strategy in patients with CLTI due to infrageniculate arterial disease.Methods
We reviewed the American College of Surgeons National Surgical Quality Improvement Program targeted lower extremity revascularization database from 2012 to 2015 to identify patients with CLTI and isolated infrageniculate arterial disease who underwent primary infrageniculate bypass or endovascular intervention. We excluded patients with a history of ipsilateral revascularization and proximal interventions. The end points were major adverse limb event (MALE), major adverse cardiovascular event (MACE), amputation at 30 days, reintervention, patency, and mortality. Multivariable logistic regression was used to determine the association of a bypass-first or an endovascular-first intervention with outcomes.Results
There were 1355 CLTI patients undergoing first-time revascularization to the infrageniculate arteries (821 endovascular-first revascularizations and 534 bypass-first revascularizations) identified. There was no significant difference in adjusted rate of 30-day MALE in the bypass-first vs endovascular-first revascularization cohort (9% vs 11.2%; odds ratio [OR], 0.73; 95% confidence interval [CI], 0.50-1.08). However, the incidence of transtibial or proximal amputation was lower in the bypass-first cohort (4.3% vs 7.4%; OR, 0.60; CI, 0.36-0.98). Patients with bypass-first revascularization had higher wound complication rates (9.7% vs 3.7%; OR, 2.75; CI, 1.71-4.42) compared with patients in the endovascular-first cohort. Compared with the endovascular-first cohort, the incidence of 30-day MACE was significantly higher in bypass-first patients (6.9% vs 2.6%; adjusted OR, 3.88; CI, 2.18-6.88), and 30-day mortality rates were 3.23% vs 1.8% (adjusted OR, 2.77; CI, 1.26-6.11). There was no difference in 30-day untreated loss of patency, reintervention of treated arterial segment, readmissions, and reoperations between the two cohorts. In subgroup analysis after exclusion of dialysis patients, there was also no significant difference in MALE or amputation between the bypass-first and endovascular-first cohorts.Conclusions
CLTI patients with isolated infrageniculate arterial disease treated by a bypass-first approach have a significantly lower 30-day amputation. However, this benefit was not observed when dialysis patients were excluded. The bypass-first cohort had a higher incidence of MACE compared with an endovascular-first strategy. These results reaffirm the need for randomized controlled trials, such as the Bypass versus Angioplasty in Severe Ischaemia of the Leg (BASIL-2) trial and Best Endovascular vs Best Surgical Therapy in Patients with Critical Limb Ischemia (BEST-CLI), to provide level 1 evidence for the role of endovascular-first vs bypass-first revascularization strategies in the treatment of this population of challenging patients. 相似文献8.
9.
10.