全文获取类型
收费全文 | 353008篇 |
免费 | 28464篇 |
国内免费 | 6171篇 |
专业分类
耳鼻咽喉 | 2370篇 |
儿科学 | 6434篇 |
妇产科学 | 6996篇 |
基础医学 | 71037篇 |
口腔科学 | 9942篇 |
临床医学 | 44222篇 |
内科学 | 56671篇 |
皮肤病学 | 5093篇 |
神经病学 | 30096篇 |
特种医学 | 12965篇 |
外国民族医学 | 35篇 |
外科学 | 34013篇 |
综合类 | 18547篇 |
现状与发展 | 68篇 |
一般理论 | 23篇 |
预防医学 | 20840篇 |
眼科学 | 5565篇 |
药学 | 29765篇 |
125篇 | |
中国医学 | 3631篇 |
肿瘤学 | 29205篇 |
出版年
2023年 | 9682篇 |
2022年 | 15038篇 |
2021年 | 17955篇 |
2020年 | 18292篇 |
2019年 | 11888篇 |
2018年 | 13256篇 |
2017年 | 13050篇 |
2016年 | 14214篇 |
2015年 | 16258篇 |
2014年 | 27978篇 |
2013年 | 23825篇 |
2012年 | 20289篇 |
2011年 | 19762篇 |
2010年 | 19503篇 |
2009年 | 18376篇 |
2008年 | 11179篇 |
2007年 | 11445篇 |
2006年 | 9921篇 |
2005年 | 8385篇 |
2004年 | 7251篇 |
2003年 | 6879篇 |
2002年 | 6485篇 |
2001年 | 6132篇 |
2000年 | 5217篇 |
1999年 | 5197篇 |
1998年 | 4126篇 |
1997年 | 3478篇 |
1996年 | 3691篇 |
1995年 | 3227篇 |
1994年 | 2606篇 |
1993年 | 2126篇 |
1992年 | 2212篇 |
1991年 | 2230篇 |
1990年 | 2194篇 |
1989年 | 1974篇 |
1988年 | 2175篇 |
1987年 | 1921篇 |
1986年 | 1676篇 |
1985年 | 1466篇 |
1984年 | 1442篇 |
1983年 | 1269篇 |
1982年 | 1231篇 |
1981年 | 1095篇 |
1980年 | 1029篇 |
1979年 | 1011篇 |
1978年 | 913篇 |
1977年 | 747篇 |
1976年 | 749篇 |
1974年 | 703篇 |
1973年 | 673篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
《International journal of oral and maxillofacial surgery》2022,51(3):332-337
The purpose of this study was to investigate the association between habitual snoring (HS), middle ear disease (MED), and speech problems in children with cleft palate. This cross-sectional study included children aged 2.0–7.9 years with non-syndromic cleft palate anomalies. Parents completed the Pediatric Sleep Questionnaire and a questionnaire about MED. Audiograms and speech assessment were also conducted. Ninety-five children were enrolled; 15.2% of families reported HS, 97.6% MED, and 17.1% speech problems. HS (37.5% vs 10.3%, P = 0.007) and early episodes of MED (92.3% vs 58.2%, P = 0.021) were more likely to be reported for children with isolated cleft palate when compared to those with cleft lip and palate. Children with cleft lip and palate had a higher frequency of MED with effusion compared to those with Robin sequence (86.4% vs 57.1%, P = 0.049). The odds ratio for HS in children with ≥1 episode of MED in the last year was 7.37 (95% confidence interval 1.55–35.15, P = 0.012). There was a trend for children with speech problems reported by parents to have HS (30.8% vs 11.5%, P= 0.076). Anatomical factors play a role in the frequency of upper airway symptoms in children with cleft palate. A recent history of at least one episode of MED was associated with an increased frequency of HS. 相似文献
2.
《Journal of diabetes and its complications》2022,36(10):108305
AimInpatient dysglycemia has been linked to short-term mortality, but longer-term mortality data are lacking. Our aim was to evaluate the association between inpatient dysglycemia and one-year mortality risk.MethodsRetrospective chart review of adults with diabetes hospitalized between 2015 and 2019. The Charlson Comorbidity Index (CCI) was used to estimate 1-year mortality risk, stratified into low (CCI ≤ 5) and high risk (CCI ≥6). Simple and multivariable logistic regression was used to evaluate the association between dysglycemic measures and high mortality risk.ResultsAmong 22,639 unique admissions, BG ≥ 180, ≥300, ≤70, <54 and <40 mg/dL were associated with adjusted odds of 1.43 (95 % CI, 1.33, 1.54), 1.58 (95 % CI, 1.48, 1.68), 2.16 (95 % CI, 2.01, 2.32), 2.58 (95 % CI, 2.32, 2.86), and 2.56 (95 % CI, 2.19, 2.99) for high mortality risk, respectively. Older age and Black race were positively associated with hyperglycemia and hypoglycemia. Myocardial infarction, congestive heart failure (CHF), and moderate to severe liver disease were most strongly associated with hyperglycemia, while renal disease, CHF, peripheral vascular disease, and peptic ulcer disease were most strongly associated with hypoglycemia.ConclusionsInpatient hypoglycemia and hyperglycemia were both positively associated with higher one-year mortality risk, with stronger magnitude of association observed for hypoglycemia. The association appears to be mediated mainly by presence of diabetes-related complications. 相似文献
3.
4.
《Journal of diabetes and its complications》2022,36(7):108205
AimsWe examined the impact of memory complaints on the concordance between self-report (SR) and electronically monitored (EM) medication adherence, independent of depression symptoms, among adults with type 2 diabetes (T2D).MethodsAdults (N = 104, age = 56.6 ± 9.2; 64% female) completed a prospective and retrospective memory questionnaire (PRMQ) and a depression symptom interview at baseline. EM was tracked over 3 months and participants rated adherence using SR. Multiple linear regression evaluated PRMQ as a moderator of the relationship between EM and SR, adjusting for depression and other covariates.ResultsPRMQ was correlated with lower SR (r = ?0.31, p = 0.001), but not with EM. PRMQ moderated the relationship between SR and EM, independent of depression symptoms. At low levels of PRMQ, SR and EM were closely related (β = 0.76, p < 0.001); at high levels of PRMQ the relationship was weaker (β = 0.28, p = 0.02). Participants who under-reported their adherence (SR < EM) had higher PRMQ scores than more concordant reporters (p = 0.016).ConclusionsSR and EM measures were less concordant among adults with T2D who endorsed higher PRMQ scores. Memory complaints may contribute to under-reporting of medication adherence in adults with T2D. 相似文献
5.
6.
《Journal of diabetes and its complications》2022,36(8):108260
AimTo verify whether arterial stiffness and endothelial dysfunction influence lower limb muscle strength and gait speed in older adults with type 2 diabetes mellitus (T2DM).MethodsCross-sectional study including seventy-eight older adults with T2DM (aged 67 ± 6 years and 42 % male). Arterial stiffness was assessed using pulse wave velocity (PWV), while endothelial function was measured by flow-mediated dilation (FMD). Lower limb muscle strength and gait speed were assessed using the 30-second chair stand test (30s-CST) and 10-Meter Walk Test, respectively.ResultsBoth PWV (m/s) and FMD (%) were univariately associated with number of repetitions in 30s-CST and gait speed (P < 0.05). After control for age, sex and body mass index, PWV remained associated with repetitions in 30s-CST (95 % CI: ?0.494 to ?0.054; P = 0.015) and gait speed (95 % CI: ?0.039 to ?0.002; P = 0.031). After adjustments for control variables, T2DM duration and glycemic control, FMD was associated with repetitions in 30s-CST (95 % CI: 0.008 to 0.324; P = 0.039) and gait speed (95 % CI: 0.011 to 0.038; P = 0.001).ConclusionIn older adults with T2DM, both arterial stiffness and endothelial dysfunction are associated with decreased leg muscle strength and slower gait speed. 相似文献
7.
8.
Forensic pathologists often encounter autopsies that require an assessment of antemortem general conditions (e.g., infection, metabolic disorders). To establish evaluation clues for such cases, we quantitatively examined macrophages and the general pathology of bone marrow in samples from 180 forensic autopsy cases of decedents with various conditions. Hematoxylin-eosin staining, Berlin blue staining, and immunostainings for CD163, CD138, and CD61 were performed. We determined the numbers per field (density) of total macrophages, swollen macrophages, macrophages with hemophagocytosis, and hemosiderin-laden macrophages. Each density was standardized by identifying its ratio to the total number of macrophages. The decedents' background data (cause of death, other pathological findings, postmortem interval, antemortem symptoms, and presence of resuscitation) were extracted. No correlations were found between the postmortem interval and the other decedent data, indicating that these data are not affected by postmortem changes. In the group in which inflammatory disease was the cause of death, there were significant elevations in the ratio of the swollen macrophage density to total macrophages. Significantly higher ratios of the density of swollen and hemophagocytic macrophages were observed in the group in which conditions with a prolonged agonal period were the cause of death. The group with a return of spontaneous circulation to resuscitation showed a significantly higher ratio of macrophage density with hemophagocytosis. This study provides the first statistical analysis focused on bone marrow histopathology in forensic autopsies. The results will be useful for elucidating causes of death and agonal-period conditions. 相似文献
9.
10.