全文获取类型
收费全文 | 59264篇 |
免费 | 5067篇 |
国内免费 | 1608篇 |
专业分类
耳鼻咽喉 | 425篇 |
儿科学 | 2098篇 |
妇产科学 | 2035篇 |
基础医学 | 6221篇 |
口腔科学 | 1668篇 |
临床医学 | 9013篇 |
内科学 | 7429篇 |
皮肤病学 | 667篇 |
神经病学 | 3725篇 |
特种医学 | 2491篇 |
外国民族医学 | 21篇 |
外科学 | 4260篇 |
综合类 | 11627篇 |
现状与发展 | 15篇 |
一般理论 | 2篇 |
预防医学 | 4562篇 |
眼科学 | 1093篇 |
药学 | 2573篇 |
100篇 | |
中国医学 | 1522篇 |
肿瘤学 | 4392篇 |
出版年
2024年 | 169篇 |
2023年 | 928篇 |
2022年 | 1787篇 |
2021年 | 2476篇 |
2020年 | 2699篇 |
2019年 | 2048篇 |
2018年 | 1962篇 |
2017年 | 2017篇 |
2016年 | 2349篇 |
2015年 | 2065篇 |
2014年 | 3752篇 |
2013年 | 3928篇 |
2012年 | 3439篇 |
2011年 | 3521篇 |
2010年 | 2844篇 |
2009年 | 2790篇 |
2008年 | 2691篇 |
2007年 | 2985篇 |
2006年 | 2767篇 |
2005年 | 2422篇 |
2004年 | 2138篇 |
2003年 | 1910篇 |
2002年 | 1582篇 |
2001年 | 1440篇 |
2000年 | 1078篇 |
1999年 | 922篇 |
1998年 | 827篇 |
1997年 | 781篇 |
1996年 | 715篇 |
1995年 | 634篇 |
1994年 | 568篇 |
1993年 | 513篇 |
1992年 | 417篇 |
1991年 | 386篇 |
1990年 | 337篇 |
1989年 | 287篇 |
1988年 | 314篇 |
1987年 | 247篇 |
1986年 | 194篇 |
1985年 | 209篇 |
1984年 | 140篇 |
1983年 | 89篇 |
1982年 | 106篇 |
1981年 | 94篇 |
1980年 | 88篇 |
1979年 | 73篇 |
1978年 | 45篇 |
1977年 | 32篇 |
1976年 | 35篇 |
1975年 | 30篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
《The Journal for Nurse Practitioners》2022,18(2):164-167
Acute diarrhea is a condition of increased water stool content, stool volume, and number of bowel movements that lasts less than 14 days. Mild diarrhea is usually self-limiting; however, undertreated moderate to severe diarrhea may cause severe dehydration and lead to hypovolemic shock. In order to prevent severe dehydration and treat patients appropriately, it is crucial for health care providers to determine the right diagnosis of patients with acute diarrhea. This article focuses on pathophysiology, general patient presentation, diagnostic tests and differential diagnosis lists of acute diarrhea to discuss which diagnosis should be made based on patient presentation and objective data. 相似文献
4.
儿童处于生长发育特殊阶段,其颌面部解剖结构、牙列情况及心理状态与成年人有明显区别。颌面部骨折患儿常出现面部发育畸形、张口受限、咬合关系紊乱等,严重影响患儿的日常生活。因此,儿童颌面部骨折的诊疗一直是临床上的难题,也是国内外的研究热点。颌面部骨折好发于青少年,损伤原因多为意外跌倒、交通伤及运动伤。近年来,数字化外科技术为儿童颌面部骨折提供精确的诊断及微创的治疗。国内外学者对于儿童颌面部骨折治疗理念逐渐倾向于手术治疗,选择可吸收材料对儿童颌面部骨折进行固定,降低对儿童面部发育的影响。长期随访对于儿童颌面部骨折患儿具有重要意义,有助于监测患儿面部发育情况。此外,临床医生应注意患儿的心理状态。对于创伤较重或发现有心理问题的患儿,应尽早干预治疗。文章就近年儿童颌面部骨折流行病学特点、诊断、治疗原则及伴发的心理问题做一综述。 相似文献
5.
Raymond J. Chan RN PhD Vivienne E. Milch MBBS MHPol Fiona Crawford-Williams PhD Oluwaseyifunmi Andi Agbejule BRadTherapy Ria Joseph MNutrDiet Jolyn Johal BND Narayanee Dick BSc Matthew P. Wallen PhD Julie Ratcliffe PhD Anupriya Agarwal MBBS Larissa Nekhlyudov MD Matthew Tieu PhD Manaf Al-Momani BPharm Scott Turnbull PhD Rahul Sathiaraj MPH Dorothy Keefe MBBS MD Nicolas H. Hart PhD 《CA: a cancer journal for clinicians》2023,73(6):565-589
Patient navigation is a strategy for overcoming barriers to reduce disparities and to improve access and outcomes. The aim of this umbrella review was to identify, critically appraise, synthesize, and present the best available evidence to inform policy and planning regarding patient navigation across the cancer continuum. Systematic reviews examining navigation in cancer care were identified in the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, Embase, Cumulative Index of Nursing and Allied Health (CINAHL), Epistemonikos, and Prospective Register of Systematic Reviews (PROSPERO) databases and in the gray literature from January 1, 2012, to April 19, 2022. Data were screened, extracted, and appraised independently by two authors. The JBI Critical Appraisal Checklist for Systematic Review and Research Syntheses was used for quality appraisal. Emerging literature up to May 25, 2022, was also explored to capture primary research published beyond the coverage of included systematic reviews. Of the 2062 unique records identified, 61 systematic reviews were included. Fifty-four reviews were quantitative or mixed-methods reviews, reporting on the effectiveness of cancer patient navigation, including 12 reviews reporting costs or cost-effectiveness outcomes. Seven qualitative reviews explored navigation needs, barriers, and experiences. In addition, 53 primary studies published since 2021 were included. Patient navigation is effective in improving participation in cancer screening and reducing the time from screening to diagnosis and from diagnosis to treatment initiation. Emerging evidence suggests that patient navigation improves quality of life and patient satisfaction with care in the survivorship phase and reduces hospital readmission in the active treatment and survivorship care phases. Palliative care data were extremely limited. Economic evaluations from the United States suggest the potential cost-effectiveness of navigation in screening programs. 相似文献
6.
7.
目的 运用标准化患者法评估四川农村地区基层医生不稳定型心绞痛和2型糖尿病两种慢性病诊断准确性现状,探讨基层医生两种慢性病诊断准确性的主要影响因素,为提升基层医生两种慢性病诊断准确性提供科学依据。方法 采用多阶段随机整群抽样方法,抽取四川省自贡市5个区/县50个乡镇100个村为研究现场,以调查当日在岗的全科及内科医生作为研究对象。共进行两轮数据采集,第1轮采集样本乡镇卫生院和村卫生室医生的基本信息;第1轮调查完成1个月后,运用标准化患者法开展第2轮调查,收集农村基层医生对不稳定型心绞痛和2型糖尿病诊断结果信息。运用Logistic回归分析农村基层医生不稳定型心绞痛和2型糖尿病诊断准确性的影响因素。结果 共纳入172名农村基层医生,完成186次标准化患者访问,正确诊断率为48.39%。其中不稳定型心绞痛的正确诊断率为18.68%(17/91),2型糖尿病的正确诊断率为76.84%(73/95)。Logistic回归分析显示,具有执业医师资质的农村基层医生更有可能做出正确诊断(OR=4.857,95%CI=1.076~21.933,P=0.040)。农村基层医生在诊断过程中涉及的必要问诊和检查条目越多,做出正确诊断的概率越高(OR=1.627,95%CI=1.065~2.485,P=0.024)。与不稳定型心绞痛相比,农村基层医生对2型糖尿病做出正确诊断的可能性更高(OR=6.306,95%CI=3.611~11.013,P<0.001)。结论 四川农村基层医生不稳定型心绞痛和2型糖尿病诊断准确性整体较差,建议以基层医生慢性病诊断过程质量改善为突破口,提升基层医生执业水平,进而提高慢性病诊断准确性。 相似文献
8.
9.
《Medical Journal Armed Forces India》2022,78(1):17-23
Pulmonary thromboembolism (PTE) is an important cause of mortality/morbidity even today despite advancement in clinical understanding as well as diagnostic facilities. Clinical diagnosis of PTE is often challenging because of nonspecific sign/symptoms. Adherence to clinical decision-making protocols and appropriate use of diagnostic modalities like computed tomography pulmonary angiography can resolve the diagnostic dilemma in most cases and help in the overall management of PTE. This article deals with various concerns as well as controversies surrounding accurate diagnosis of PTE as on date. 相似文献
10.
Hiroshi Kashida 《Digestive endoscopy》2019,31(1):16-23
The aim of the present review was to clarify how we should detect and diagnose sessile serrated polyps (SSP) endoscopically. A systematic search was conducted of MEDLINE from January 2004 through March 2018. Nine findings: (i) proximal location; (ii) size >10 mm; (iii) irregular shape; (iv) indistinctive border; (v) cloud‐like surface; (vi) mucus cap; (vii) rim of debris in white‐light endoscopy; (viii) dilated vessels; and (ix) dilated crypts (pits) in image‐enhanced endoscopy were considered to be candidate discriminators of SSP from hyperplastic polyps. Prospective studies in a general setting are warranted to validate the above‐mentioned endoscopic features of SSP during real‐time colonoscopy and to determine whether these features are useful for the differential diagnosis of SSP. 相似文献