全文获取类型
收费全文 | 16900篇 |
免费 | 1058篇 |
国内免费 | 143篇 |
专业分类
耳鼻咽喉 | 63篇 |
儿科学 | 6690篇 |
妇产科学 | 2761篇 |
基础医学 | 1242篇 |
口腔科学 | 67篇 |
临床医学 | 1422篇 |
内科学 | 1147篇 |
皮肤病学 | 117篇 |
神经病学 | 979篇 |
特种医学 | 187篇 |
外科学 | 960篇 |
综合类 | 623篇 |
预防医学 | 1085篇 |
眼科学 | 106篇 |
药学 | 531篇 |
13篇 | |
中国医学 | 16篇 |
肿瘤学 | 92篇 |
出版年
2023年 | 480篇 |
2022年 | 695篇 |
2021年 | 910篇 |
2020年 | 805篇 |
2019年 | 613篇 |
2018年 | 743篇 |
2017年 | 820篇 |
2016年 | 687篇 |
2015年 | 673篇 |
2014年 | 1310篇 |
2013年 | 951篇 |
2012年 | 975篇 |
2011年 | 925篇 |
2010年 | 770篇 |
2009年 | 683篇 |
2008年 | 634篇 |
2007年 | 649篇 |
2006年 | 591篇 |
2005年 | 481篇 |
2004年 | 450篇 |
2003年 | 387篇 |
2002年 | 377篇 |
2001年 | 416篇 |
2000年 | 249篇 |
1999年 | 237篇 |
1998年 | 186篇 |
1997年 | 119篇 |
1996年 | 133篇 |
1995年 | 77篇 |
1994年 | 94篇 |
1993年 | 71篇 |
1992年 | 96篇 |
1991年 | 89篇 |
1990年 | 106篇 |
1989年 | 89篇 |
1988年 | 68篇 |
1987年 | 46篇 |
1986年 | 46篇 |
1985年 | 58篇 |
1984年 | 41篇 |
1983年 | 26篇 |
1982年 | 53篇 |
1981年 | 41篇 |
1980年 | 39篇 |
1979年 | 30篇 |
1978年 | 20篇 |
1977年 | 22篇 |
1976年 | 10篇 |
1975年 | 8篇 |
1974年 | 10篇 |
排序方式: 共有10000条查询结果,搜索用时 531 毫秒
1.
《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
2.
3.
《Canadian journal of ophthalmology. Journal canadien d'ophtalmologie》2022,57(3):195-200
ObjectiveThe aim of this study was to evaluate the incidence, severity, and treatment modalities of retinopathy of prematurity (ROP) in moderate and late preterm infants with a gestational age (GA) >31 + 6 weeks.MethodsROP screening results of preterm infants with GA >31 + 6 weeks to 36 + 6 weeks between March 2013 and January 2019 were evaluated retrospectively. Infants were divided into 2 groups according to GA as 32–33 + 6 weeks (moderate preterm) and 34–36 + 6 weeks (late preterm). In these groups, any ROP and severe ROP (requiring treatment) development rates and ROP types and treatment modalities were evaluated.ResultsA total of 4156 preterm infants, 1875 (45.1%) female and 2281 (54.9%) male, were included. Overall, 1466 (35.2%) of the infants were moderate preterm and 2690 (64.8%) were late preterm. The incidences of any ROP and severe ROP were 22% and 2.5%, respectively. The rate of severe ROP was 5.3% in moderate preterm infants and 0.9% in late preterm infants. Significant correlations were determined between duration of hospital stay, birth weight (BW), and GA with ROP development (r = +0.415, r = ?0.258, r = ?0.199, respectively; p < 0.001 for all). Of 102 patients (2.5%) requiring treatment, 64 (62.7%) had laser, 34 (33.3%) had intravitreal bevacizumab (IVB), 2 (1.9%) had sequential IVB and laser, and 2 (1.9%) had vitreoretinal surgery.ConclusionROP seems to still be an important health problem in moderate and late preterm infants in our country according to data from screening high-risk preterm infants with a GA >31 + 6 weeks. In this cohort, ROP development correlates with GA, BW, and duration of hospitalization significantly. 相似文献
4.
《Seminars in perinatology》2022,46(3):151524
Addressing bias and disparities in counseling and care requires that we contend with dehumanizing attitudes, stereotypes, and beliefs that our society and profession holds towards people of color, broadly, and Black birthing people in particular. It also necessitates an accounting of the historically informed, racist ideologies that shape present-day implicit biases. These biases operate in a distinctly complex and damaging manner in the context of end-of-life care, which centers around questions related to human pain, suffering, and value. Therefore, this paper aims to trace biases and disparities that operate in periviable care, where end-of-life decisions are made at the very beginning of life. We start from a historical context to situate racist ideologies into present day stereotypes and tropes that dehumanize and disadvantage Black birthing people and Black neonates in perinatal care. Here, we review the literature, address historical incidents and consider their impact on our ability to deliver patient-centered periviable care. 相似文献
5.
《Academic pediatrics》2020,20(5):609-618
ObjectiveExposure to early adversity carries long term harmful consequences for children's health and development. This study aims to 1) estimate the prevalence of childhood adversity for Australian children from infancy to 10–11 years, and 2) document inequalities in the distribution of adversity according to socioeconomic position (SEP), Indigenous status, and ethnicity.MethodsAdversity was assessed every 2 years from 0–1 to 10–11 years in the nationally representative birth cohort of the Longitudinal Study of Australian Children (N = 5107). Adversity included legal problems; family violence; household mental illness; household substance abuse; harsh parenting; parental separation/divorce; unsafe neighborhood; family member death; and bullying (from 4 to 5 years). Adversities were examined individually and summed for a measure of multiple adversity (2+ adverse experiences).ResultsBy 10–11 years, 52.8% (95% confidence interval [CI] 51.0–54.7) of children had been exposed to 2 or more adversities. When combined with low SEP, children from ethnic minority and from Indigenous backgrounds had 4 to 8 times the odds of exposure to 2 or more adversities than children from higher SEP Anglo-Euro backgrounds, respectively (odds ratio [OR] 4.3, 95% CI 2.8–6.6 and OR 8.1, 95% CI 4.4–14.8). Ethnic minority and Indigenous children from higher SEP backgrounds had increased odds of exposure to multiple adversity than similarly advantaged Anglo-Euro children (OR 1.8, 95% CI 1.4–2.3 and OR 2.3, 95% CI 1.3–4.3, respectively).ConclusionsAddressing early adversity is a significant opportunity to promote health over the life course, and reduce health inequalities experienced by marginalized groups of children. 相似文献
6.
ObjectivesTo explore the relationships among potentially modifiable factors related to childbirth and effective breastfeeding initiation at approximately 36 hours after birth and duration and exclusivity at hospital discharge, 2 weeks, 2 months, and 6 months after birth in primiparous women and to explore whether modifiable and nonmodifiable secondary factors and covariates influenced the relationships among factors related to childbirth and these breastfeeding outcomes.DesignA prospective, longitudinal, cohort study.SettingThe postpartum units of two general hospitals in eastern Canada.ParticipantsNinety-seven mother–infant dyads.MethodsWe recorded demographic, childbirth, obstetric history, and breastfeeding data through chart review. A breastfeeding observation was completed at approximately 36 hours after birth by unit nurses. Participants maintained breastfeeding logs in hospital and for 6 months after birth and completed three self-report questionnaires before discharge. We analyzed outcomes using backward stepwise linear and logistic regression.ResultsOne childbirth factor, labor induced with oxytocin, was negatively associated with effective initiation of breastfeeding, and none was related to breastfeeding duration and exclusivity at any time point. Maternal weight; professional support; and newborn’s gestational age at birth, 5-minute Apgar score, weight loss, LATCH score, and active feeds (newborn actively suckled at the breast) were significantly associated with breastfeeding outcomes.ConclusionInduction of labor with oxytocin should be used judiciously; when used, nurses must be hypervigilant to assess the mother–infant dyad for breastfeeding issues and to intervene to prevent or remediate them. 相似文献
7.
8.
《Journal of minimally invasive gynecology》2020,27(6):1308-1315
Study ObjectiveTo correlate the type and degree of adenomyosis, scored through a new system based on the features of transvaginal sonography, to patients’ symptoms and fertility.DesignThis is a multicenter, observational, prospective study.SettingTwo endometriosis tertiary referral centers (University of Rome “Tor Vergata” and University of Siena).PatientsA total of 108 patients with ultrasonographic signs of adenomyosis.InterventionsA new ultrasonographic scoring system designed to assess the severity and the extent of uterine adenomyosis was used to stage the disease in correlation with the clinical symptoms. Menstrual uterine bleeding was assessed by a pictorial blood loss analysis chart, painful symptoms were evaluated using a visual analog scale, and infertility factors were considered.Measurements and Main ResultsA total of 108 patients with ultrasonographic signs of adenomyosis (mean age ± standard deviation, 37.7 ± 7.7 years) were classified according to the proposed scoring system. Women with ultrasound diagnosis of diffuse adenomyosis were older (p = .04) and had heavier menstrual bleeding (p = .04) than women with focal disease; however, no statistically significant differences were found regarding the presence and severity of dyspareunia and dysmenorrhea. Higher values of menstrual bleeding were found for severe diffuse adenomyosis, with the highest values being found in those with adenomyomas. In patients trying to conceive, the presence of ultrasound findings of focal disease was associated with a higher percentage of infertility than in those with diffuse disease, and the focal involvement of the junctional zone showed a higher percentage of at least 1 miscarriage than in those with diffuse adenomyosis.ConclusionThe ultrasonographic evaluation of the type and extension of adenomyosis in the myometrium seems to be important in correlation to the severity of symptoms and infertility. 相似文献
9.
Jamaal L. Benjamin MD PhD Rebecca Dennis DO Stacy White Jr MD David Munson MD Sudha A. Anupindi MD Maciej Piskunowicz MD Kassa Darge MD PhD Ami Gokli MD Misun Hwang MD 《Journal of ultrasound in medicine》2020,39(5):1031-1036
Bowel diseases of prematurity, including necrotizing enterocolitis, are dreaded ailments of neonates. Early diagnosis is difficult, with clinical and radiographic findings often inconclusive. We present a novel use of contrast-enhanced ultrasound in detection of pediatric bowel disease. Early identification of compromised blood flow or an at-risk bowel can be quantitatively detected and monitored. This ability has implications for guidance of emerging therapies, allowing targeting of inflammation. These findings represent an advancement in detection of bowel disease in neonates. 相似文献
10.
Indian Journal of Pediatrics - 相似文献