全文获取类型
收费全文 | 3115篇 |
免费 | 210篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 27篇 |
儿科学 | 111篇 |
妇产科学 | 77篇 |
基础医学 | 492篇 |
口腔科学 | 151篇 |
临床医学 | 235篇 |
内科学 | 667篇 |
皮肤病学 | 37篇 |
神经病学 | 265篇 |
特种医学 | 79篇 |
外科学 | 336篇 |
综合类 | 33篇 |
一般理论 | 17篇 |
预防医学 | 282篇 |
眼科学 | 45篇 |
药学 | 182篇 |
中国医学 | 3篇 |
肿瘤学 | 293篇 |
出版年
2023年 | 19篇 |
2022年 | 19篇 |
2021年 | 39篇 |
2020年 | 36篇 |
2019年 | 36篇 |
2018年 | 63篇 |
2017年 | 52篇 |
2016年 | 55篇 |
2015年 | 44篇 |
2014年 | 72篇 |
2013年 | 112篇 |
2012年 | 180篇 |
2011年 | 194篇 |
2010年 | 98篇 |
2009年 | 83篇 |
2008年 | 175篇 |
2007年 | 164篇 |
2006年 | 134篇 |
2005年 | 157篇 |
2004年 | 106篇 |
2003年 | 92篇 |
2002年 | 125篇 |
2001年 | 108篇 |
2000年 | 66篇 |
1999年 | 99篇 |
1998年 | 53篇 |
1997年 | 45篇 |
1996年 | 27篇 |
1995年 | 26篇 |
1994年 | 23篇 |
1993年 | 23篇 |
1992年 | 73篇 |
1991年 | 69篇 |
1990年 | 63篇 |
1989年 | 48篇 |
1988年 | 53篇 |
1987年 | 44篇 |
1986年 | 60篇 |
1985年 | 51篇 |
1984年 | 36篇 |
1983年 | 39篇 |
1982年 | 16篇 |
1981年 | 24篇 |
1979年 | 22篇 |
1978年 | 16篇 |
1977年 | 18篇 |
1976年 | 15篇 |
1975年 | 16篇 |
1974年 | 21篇 |
1969年 | 20篇 |
排序方式: 共有3332条查询结果,搜索用时 15 毫秒
1.
Arvid Nikolai Kildahl Sissel Berge Helverschou Trine Lise Bakken Hanne Weie Oddli 《Journal of mental health research in intellectual disabilities》2020,13(3):201-230
ABSTRACT
Introduction
Individuals with autism spectrum disorder (ASD) and intellectual disability (ID) seem to be at increased risk for post-traumatic stress disorder (PTSD), but knowledge is sparse regarding its identification in this population. Previous research indicates that certain symptoms of PTSD may be more easily recognized, and that identifying reexperiencing and avoidance is particularly challenging. 相似文献2.
Iclea Rocha Gama Euclides Marinho Trindade-Filho Suzana Lima Oliveira Nassib Bezerra Bueno Isabelle Tenório Melo Cyro Rego Cabral-Junior Elenita M. Barros Jaqueline A. Galvão Wanessa S. Pereira Raphaela C. Ferreira Bruna R. Domingos Terezinha da Rocha Ataide 《Metabolic brain disease》2015,30(1):93-98
3.
Hillary R Bogner Mark S Cary Martha L Bruce Charles F Reynolds Benoit Mulsant Thomas Ten Have George S Alexopoulos 《The American journal of geriatric psychiatry》2005,13(10):861-868
OBJECTIVE: The authors described the influence of specific medical conditions on clinical remission and response of major depression (MDD) in a clinical trial evaluating a care-management intervention among older primary-care patients. METHODS: Adults age 60 years and older were randomly selected and screened for depression. Participants were randomly assigned to Usual Care or to an Intervention with a depression care-manager offering algorithm-based care for MDD. In all, 324 adults meeting criteria for MDD were included in these analyses. Remission and response was defined by a score on the Hamilton Rating Scale for Depression <10 and by a decrease from baseline of > or =50%, respectively. Medical comorbidity was ascertained through self-report. Cognitive impairment was defined by a score <24 on the Mini-Mental State Exam (MMSE). RESULTS: In Usual Care, rates of remission were faster in persons who reported atrial fibrillation (AF) than in persons who did not report AF and slower in persons who reported chronic pulmonary disease than in persons who did not report chronic pulmonary disease; rates of response were less stable in persons with MMSE <24 than in those with MMSE > or =24. In the Intervention condition, none of the specific chronic medical conditions were significantly associated with outcomes for MDD. CONCLUSIONS: Because disease-specific findings were observed in persons who received Usual Care but not in persons who received more intensive treatment in the Intervention condition, our results suggest that the association of medical comorbidity and treatment outcomes for MDD may be determined by the intensity of treatment for depression. 相似文献
4.
5.
6.
Transesophageal echocardiography is a safe, minimally invasive procedure that should be considered when the diagnosis of cardiac tamponade is a possibility and when conventional methods fail to provide conclusive diagnostic information. In this report, we describe a 74-year-old man in the intensive-care unit whose condition was unstable postoperatively because of an occult loculated pericardial effusion and cardiac tamponade. Routine noninvasive and invasive monitoring, including hemodynamic monitoring and transthoracic echocardiography, failed to confirm definitively the suspected diagnosis of cardiac tamponade. In addition, because of the hemodynamic instability of the patient, transporting him for definitive tests (such as fast computed tomographic scanning of the mediastinum, which could not be performed at the bedside) for assessment of cardiac tamponade was relatively contraindicated. In our patient, the diagnostic information obtained by transesophageal echocardiography may have been lifesaving. 相似文献
7.
S B Kaye J Wanders M Clavel J Verweij M J Piccart J F Smyth W W Ten Bokkel Huinink D J Wagener I R Judson F Cavalli 《Annals of oncology》1992,3(5):406-408
A total of 91 eligible patients with metastatic cancer have been treated in a series of phase II trials of the novel pentacyclic pyrroloquinone, fosquidone. Tumour types were breast (24), ovary (25), head and neck (21) and melanoma (21). All patients, except those with melanoma had received prior chemotherapy. The drug was given intravenously as a 20 min infusion, at the dose of 120 mg/m2 on days 1 to 5 of a 3 week cycle. Treatment was well tolerated; the only significant side-effects being mild headaches and generalised musculo-skeletal pains. Response was assessed after 2 cycles of therapy. Only one patient (with head and neck cancer) achieved an objective partial response, lasting 6 weeks. A total of 12 patients demonstrated stable disease for a median duration of 15 to 20 weeks. Using this schedule of administration, fosquidone has no significant antitumour activity in this group of tumours. 相似文献
8.
S W Wise K D Hopper T A Schwartz T R Ten Have C J Kasales 《AJNR. American journal of neuroradiology》1997,18(3):401
PURPOSETo evaluate scanning parameters (conventional versus spiral CT, section thickness, and pitch) and vessel orientation in the performance of CT angiography.METHODSConventional CT and 1.0-, 1.5-, and 2.0-pitch spiral CT acquisitions of a carotid phantom designed with vessels oriented parallel to the z-axis, 45 degrees oblique, and perpendicular to the z-axis were obtained with section thicknesses of 2, 4, and 8 mm. The phantom contained 32 vessels with 0% to 100% stenoses. Normal and stenotic luminal diameters were measured and the number of artifacts was assessed.RESULTSNo overall difference was observed among conventional and spiral CT acquisitions obtained with pitches of 1.0, 1.5, and 2.0. With thicker sections, CT angiographic accuracy decreased and artifacts increased. The three-vessel orientations were relatively comparable in accuracy in terms of the percentage of stenosis measured. Vessels parallel to the z-axis suffered less artifactual degradation. Unique artifacts, such as luminal distortion and beam hardening, were observed in vessels oriented at 45 degrees and perpendicular to the z-axis.CONCLUSIONUse of thinner sections with vessels oriented parallel to the z-axis optimizes CT angiographic quality. There is no apparent degradation with the use of spiral CT, and a pitch of 1.5 or 2.0 provides results equivalent to 1.0-pitch spiral studies. 相似文献
9.
10.
Abstract: This article integrates theory and research related to boundary ambiguity in parents of children with a chronic health condition. We propose that boundary ambiguity is a risk factor for psychological distress in these parents. Clinical applications and a case example highlight how boundary ambiguity can be assessed and managed in clinical settings by professionals working with parents with chronically ill children. Questions are provided for assessing boundary ambiguity in clinical and research settings, and implications for research are discussed. 相似文献