全文获取类型
收费全文 | 2808篇 |
免费 | 161篇 |
国内免费 | 12篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 90篇 |
妇产科学 | 36篇 |
基础医学 | 292篇 |
口腔科学 | 17篇 |
临床医学 | 333篇 |
内科学 | 535篇 |
皮肤病学 | 37篇 |
神经病学 | 157篇 |
特种医学 | 149篇 |
外科学 | 408篇 |
综合类 | 273篇 |
预防医学 | 208篇 |
眼科学 | 23篇 |
药学 | 152篇 |
肿瘤学 | 262篇 |
出版年
2023年 | 21篇 |
2022年 | 19篇 |
2021年 | 59篇 |
2020年 | 23篇 |
2019年 | 34篇 |
2018年 | 52篇 |
2017年 | 44篇 |
2016年 | 37篇 |
2015年 | 83篇 |
2014年 | 71篇 |
2013年 | 102篇 |
2012年 | 153篇 |
2011年 | 164篇 |
2010年 | 128篇 |
2009年 | 116篇 |
2008年 | 168篇 |
2007年 | 157篇 |
2006年 | 172篇 |
2005年 | 150篇 |
2004年 | 166篇 |
2003年 | 120篇 |
2002年 | 103篇 |
2001年 | 38篇 |
2000年 | 42篇 |
1999年 | 60篇 |
1998年 | 53篇 |
1997年 | 69篇 |
1996年 | 63篇 |
1995年 | 48篇 |
1994年 | 42篇 |
1993年 | 21篇 |
1992年 | 34篇 |
1991年 | 15篇 |
1990年 | 16篇 |
1989年 | 23篇 |
1988年 | 32篇 |
1987年 | 24篇 |
1986年 | 21篇 |
1985年 | 23篇 |
1984年 | 22篇 |
1983年 | 15篇 |
1982年 | 14篇 |
1981年 | 20篇 |
1980年 | 19篇 |
1979年 | 8篇 |
1978年 | 10篇 |
1977年 | 9篇 |
1976年 | 8篇 |
1966年 | 7篇 |
1964年 | 7篇 |
排序方式: 共有2981条查询结果,搜索用时 9 毫秒
51.
Withdrawal severity and voluntary alcohol consumption are inversely related in rats and mice. The present study demonstrated this empirical relation and extended it in two ways. First, the rats were selectively bred for low (LoS) and high (HiS) saccharin intake, a phenotype that correlates positively with ethanol intake and inversely with emotional reactivity. Withdrawal has not yet been studied in these rats. Second, proclivity to consume ethanol was measured as conditioned preference for an ethanol-paired flavor. After 2 weeks of forced exposure to ethanol and a period of abstinence, LoS rats showed elevated acoustic startle; HiS rats did not (Exp. 1). When ethanol- and no-ethanol solutions were available freely during conditioning, both LoS and HiS rats preferred a flavor paired with 4% ethanol, but only HiS rats preferred a flavor paired with 10% ethanol (Exp. 2A); when exposure to the two solutions was controlled, all groups except LoS males preferred flavors paired with 4% or 10% ethanol (Exp. 2B). Thus, as predicted, withdrawal was more severe in the line with less ethanol proclivity (LoS). These results implicate basic associative and affective processes in individual differences in patterns of alcohol use. 相似文献
52.
53.
Malignant phyllodes tumour is an uncommon breast neoplasm which undergoes osteosarcomatous differentiation in 1.3% of cases. We document the plain film, CT and scintigraphic features of a case of pulmonary metastases from this rare primary tumour. 相似文献
54.
55.
56.
Genomic characterization of pediatric B‐lymphoblastic lymphoma and B‐lymphoblastic leukemia using formalin‐fixed tissues 下载免费PDF全文
57.
Joan SK Ng FRCS William Wong FRCP Ricky WK Law FRCS Joannie Hui MRCP Esther N Wong MRCP Dennis SC Lam FRCOphth 《Clinical & experimental ophthalmology》2001,29(4):239-243
Purpose : To investigate ocular complications arising from nephrotic syndrome and/or its treatments in children. Methods : A cross‐sectional study was conducted in a teaching hospital. A total of 31 paediatric patients with nephrotic syndrome were studied. Comprehensive ophthalmic assessments on best‐corrected visual acuity, intraocular pressure, slit‐lamp and fundus examination were taken. Information regarding histological diagnosis of nephrotic syndrome and its treatment regimen in each patient was reviewed and analysed. Results : Bilateral posterior subcapsular cataracts were detected in three of 29 patients (10.3%) who received steroid therapy. Two had normal vision while one had visual acuity reduced to 6/15 in both eyes. The age of onset of the nephrotic syndrome in these three patients was 2 years, which was significantly younger than those without cataract (5.4 ± 3.2 years, P < 0.001). Three patients (9.7%) had isolated asymptomatic fundal findings of tortuous and dilated retinal vessels. Hypertensive retinopathy was found in one patient (3.2%). No steroid‐induced glaucoma, uveitis, ocular infection, or other eye complications related to the use of steroids or other immunosuppressive agents were noted. Conclusions : Children who have nephrotic syndrome often require prolonged, intermittent high dose of systemic corticosteroid therapy. Paediatricians should be aware of the potential risk of developing steroid‐related complications, especially posterior subcapsular cataract. It appears to have a higher risk when steroid therapy is used in very young patients. Early detection would help to prevent amblyopia development, particularly in the group of immature eyes. 相似文献
58.
Mara Koelker Khalid Alkhatib Logan Briggs Muhieddine Labban Christian P. Meyer Christina M. Dieli-Conwright Dong-Woo Kang Graeme Steele Mark A. Preston Timothy N. Clinton Steve L. Chang Adam S. Kibel Quoc-Dien Trinh Matthew Mossanen 《Canadian Urological Association journal》2023,17(1):E8
IntroductionThere is a scarcity of data on the impact of behavioral habits, such as exercise, on physical health in patients with bladder cancer. We investigated the association of exercise on self-reported physical health status and examined the prevalence of bladder cancer patients with sedentary lifestyle.MethodsWe examined cross-sectional data of participants diagnosed with bladder cancer within the Behavioral Risk Factor Surveillance System (BRFSS) from 2016–2020. Patient health status was surveyed using self-reported measures, such as the total days per month when their “physical health is not good.” The primary outcome was patient-reported poor physical health for more than 14 days within a one-month period.ResultsOut of 2 193 981 survey participants, we identified 936 with a history of bladder cancer. Nearly one in three bladder cancer patients reported being sedentary within the last month, as a total of 307 (32.8%) patients reported no exercise within the last 30 days. The remaining 628 (67.2%) reported exercising for at least one day within the last month. In multivariable logistic regression model analysis, we found that exercise is protective for self-reported poor physical health status (odds ratio 0.37, 95% confidence interval 0.25–0.56, p<0.001). Patients that exercised were less likely to report bad physical health.ConclusionsApproximately one in three bladder cancer patients report no exercise within 30 days, suggesting a sedentary lifestyle. Patients that are active are less likely to self-report poor physical health status. Implementation of exercise programs for bladder cancer patients could be promising in improving health status.KEY MESSAGES
- Approximately 1 in 3 bladder cancer patients report a sedentary lifestyle.
- Patients that are active are less likely to self-report poor physical health status.
- Implementation of exercise programs might improve health status.
- Clinicians of bladder cancer patients should engage in increasing activity levels.
59.
60.