全文获取类型
收费全文 | 12892篇 |
免费 | 1400篇 |
国内免费 | 77篇 |
专业分类
耳鼻咽喉 | 188篇 |
儿科学 | 448篇 |
妇产科学 | 229篇 |
基础医学 | 1548篇 |
口腔科学 | 123篇 |
临床医学 | 1682篇 |
内科学 | 3157篇 |
皮肤病学 | 171篇 |
神经病学 | 1289篇 |
特种医学 | 642篇 |
外科学 | 2078篇 |
综合类 | 151篇 |
一般理论 | 4篇 |
预防医学 | 910篇 |
眼科学 | 414篇 |
药学 | 642篇 |
中国医学 | 8篇 |
肿瘤学 | 685篇 |
出版年
2023年 | 172篇 |
2022年 | 224篇 |
2021年 | 465篇 |
2020年 | 313篇 |
2019年 | 367篇 |
2018年 | 518篇 |
2017年 | 381篇 |
2016年 | 414篇 |
2015年 | 429篇 |
2014年 | 569篇 |
2013年 | 714篇 |
2012年 | 958篇 |
2011年 | 925篇 |
2010年 | 535篇 |
2009年 | 525篇 |
2008年 | 716篇 |
2007年 | 651篇 |
2006年 | 608篇 |
2005年 | 583篇 |
2004年 | 506篇 |
2003年 | 415篇 |
2002年 | 375篇 |
2001年 | 139篇 |
2000年 | 99篇 |
1999年 | 100篇 |
1998年 | 150篇 |
1997年 | 148篇 |
1996年 | 112篇 |
1995年 | 101篇 |
1994年 | 85篇 |
1993年 | 84篇 |
1992年 | 104篇 |
1991年 | 70篇 |
1990年 | 91篇 |
1989年 | 107篇 |
1988年 | 108篇 |
1987年 | 116篇 |
1986年 | 99篇 |
1985年 | 90篇 |
1984年 | 82篇 |
1983年 | 70篇 |
1982年 | 77篇 |
1981年 | 66篇 |
1980年 | 49篇 |
1979年 | 63篇 |
1978年 | 52篇 |
1976年 | 52篇 |
1974年 | 50篇 |
1972年 | 46篇 |
1971年 | 43篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
ABSTRACTScreening rates for trauma are low in health care settings. We examined the association between health care providers’ (HCPs) experience of physical or sexual trauma and their screening of female patients for trauma. HCPs at an urban academic medical institution were surveyed from September through November 2016. The Brief Trauma (BTQ) and Sexual and Physical Abuse History Questionnaires (SPAHQ) assessed their own experiences of trauma. The Screening Practices Questionnaire (SPQ) assessed HCPs trauma screening. Multiple regression analyses were performed. Among 212 respondents aged 22–67 years, most were female (78.3%) and white (76.1%). Nurses (41.0%) were the largest occupational group. Overall, 85.8% reported having experienced trauma. No significant difference was observed in median SPQ scores between HCPs who had experienced trauma (3.88 [Interquartile Range (IQR) 3.44–4.31]) and those who had not (4.00 [IQR 3.47–4.33], p = .645). In an adjusted model, screening policy awareness and having an obstetrics & gynecology or psychiatry specialty were associated with higher SPQ scores (p < .001). The prevalence of trauma experience in this sample was high, but not associated with screening. Screening policy awareness and practice specialty were associated with screening. HCP factors associated with greater trauma screening should be explored. 相似文献
2.
3.
4.
Matthew J Matasar Ellen K Ritchie Nathan Consedine Carol Magai Alfred I Neugut 《European journal of cancer prevention》2006,15(4):367-370
Despite significant improvements in the prognosis of acute promyelocytic leukemia brought about by therapeutic advances, understanding of the epidemiology of acute promyelocytic leukemia remains limited. Earlier reports have suggested that Hispanics may have an increased incidence of acute promyelocytic leukemia, but no systematic analysis of national data has yet been reported. We performed a retrospective cohort study, using data from the Surveillance, Epidemiology, and End Results (SEER) Program of the National Cancer Institute from 1992-2001 in order to compare leukemia incidence rates as a function of race and ethnicity. We identified 709 cases of acute promyelocytic leukemia and analyzed incidence rates by race and sex. Hispanics were not found to have greater lifetime incidence rates than whites, with an incidence relative rate (IRR) of 0.86 that of whites (P=0.17). The age distribution among Hispanics was significantly different from non-Hispanic whites, with greater incidence rates for children ages 1-19 years (IRR=1.9, P=0.02) and adult ages 20-44 years (IRR=1.6, P=0.004). Blacks had lower lifetime incidence rates than non-Hispanic whites (IRR=0.75, P=0.04), Hispanics (IRR=0.64, P=0.007), and Asians (IRR=0.67, P=0.03). Asians did not differ from non-Hispanic whites in lifetime or age-specific incidence rates. These results indicate that while US Hispanics do not have greater lifetime incidence rates of acute promyelocytic leukemia, blacks have lower incidence rates of acute promyelocytic leukemia than Hispanics, non-Hispanic whites, and Asians. 相似文献
5.
Edward R. Westrick MS Allan P. Shapiro PhD Peter E. Nathan PhD John Brick PhD 《Alcoholism, clinical and experimental research》1988,12(4):531-533
The present study demonstrates that alcohol-induced memory impairment can be attenuated by pretreatment with an oral tryptophan supplementation. These results provide support for the role of a brain serotonin deficit in this impairment and highlight the impact a dietary manipulation can have on a complex behavioral process. 相似文献
6.
Timothy J Halligan Nathan G Russell William J Dunn Steven J Caldroney Timothy B Skelton 《Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics》2005,100(6):688-692
Scurvy is a nondiscriminatory disease process resulting from a nutritional deficiency of ascorbic acid (vitamin C). The severe vitamin deficiency produces a breakdown in the cellular structure of the body. This case report describes a middle-age woman with a history of edema, bruising of the lower extremities, anemia, and severe periodontal disease. Her presentation and medical history are classic for the signs of scurvy. Scurvy is now only uncommonly seen in developed countries, but there are still vulnerable populations whose nutritional status can lead to scurvy. The aim of this report is to help the clinician identify and treat scurvy, a disease that was once feared for its high mortality but is now easily treatable, even in cases that have progressed to multiple organ dysfunction and failure. 相似文献
7.
8.
9.
A F Shorr J L Wainright C S Cors C J Lettieri S D Nathan 《The European respiratory journal》2007,30(4):715-721
Pulmonary hypertension (PH) may complicate idiopathic pulmonary fibrosis (IPF) but the prevalence of PH in IPF remains undefined. The present authors sought to describe the prevalence of PH in IPF. The lung transplant registry for the USA (January 1995 to June 2004) was analysed and IPF patients who had undergone right heart catheterisation (RHC) were identified. PH was defined as a mean pulmonary arterial pressure ((Ppa)) > or =25 mmHg and severe PH as a (Ppa) >40 mmHg. Independent factors associated with PH were determined. Of the 3,457 persons listed, 2,525 (73.0%) had undergone RHC. PH affected 46.1% of subjects; approximately 9% had severe PH. Variables independently associated with mild-to-moderate PH were as follows: need for oxygen, pulmonary capillary wedge pressure (P(pcw)) and forced expiratory volume in one second (FEV(1)). Independent factors related to severe PH included the following: carbon dioxide tension, age, FEV(1), P(pcw), need for oxygen and ethnicity. A sensitivity analysis in subjects with P(pcw) <15 mmHg did not appreciably alter the present findings. Pulmonary hypertension is common in idiopathic pulmonary fibrosis patients awaiting lung transplant, but the elevations in mean pulmonary arterial pressure are moderate. Lung volumes alone do not explain the pulmonary hypertension. Given the prevalence of pulmonary hypertension and its relationship with surrogate markers for quality of life (e.g. activities of daily living), future trials of therapies for this may be warranted. 相似文献
10.