全文获取类型
收费全文 | 89715篇 |
免费 | 8555篇 |
国内免费 | 2235篇 |
专业分类
耳鼻咽喉 | 1125篇 |
儿科学 | 1286篇 |
妇产科学 | 667篇 |
基础医学 | 5851篇 |
口腔科学 | 1188篇 |
临床医学 | 16717篇 |
内科学 | 11558篇 |
皮肤病学 | 538篇 |
神经病学 | 9639篇 |
特种医学 | 23012篇 |
外国民族医学 | 20篇 |
外科学 | 7237篇 |
综合类 | 9249篇 |
现状与发展 | 1篇 |
预防医学 | 2376篇 |
眼科学 | 1356篇 |
药学 | 3274篇 |
71篇 | |
中国医学 | 741篇 |
肿瘤学 | 4599篇 |
出版年
2024年 | 261篇 |
2023年 | 1559篇 |
2022年 | 3107篇 |
2021年 | 4195篇 |
2020年 | 3868篇 |
2019年 | 3670篇 |
2018年 | 3518篇 |
2017年 | 3780篇 |
2016年 | 4049篇 |
2015年 | 3915篇 |
2014年 | 6626篇 |
2013年 | 5938篇 |
2012年 | 5464篇 |
2011年 | 5922篇 |
2010年 | 4810篇 |
2009年 | 4981篇 |
2008年 | 4890篇 |
2007年 | 4621篇 |
2006年 | 4068篇 |
2005年 | 3516篇 |
2004年 | 2932篇 |
2003年 | 2257篇 |
2002年 | 1818篇 |
2001年 | 1706篇 |
2000年 | 1404篇 |
1999年 | 1091篇 |
1998年 | 1111篇 |
1997年 | 1006篇 |
1996年 | 831篇 |
1995年 | 742篇 |
1994年 | 598篇 |
1993年 | 489篇 |
1992年 | 393篇 |
1991年 | 306篇 |
1990年 | 242篇 |
1989年 | 168篇 |
1988年 | 148篇 |
1987年 | 136篇 |
1986年 | 77篇 |
1985年 | 71篇 |
1984年 | 53篇 |
1983年 | 38篇 |
1982年 | 32篇 |
1981年 | 32篇 |
1980年 | 22篇 |
1979年 | 13篇 |
1978年 | 7篇 |
1977年 | 9篇 |
1976年 | 5篇 |
1973年 | 3篇 |
排序方式: 共有10000条查询结果,搜索用时 625 毫秒
51.
52.
雄激素不敏感综合征(androgen insensitivity syndrome,AIS)又称为睾丸女性化综合征(testicular feminization syndrome,TFS),是一种X连锁遗传病,是男性假两性畸形中较常见的类型,可分为完全型AIS和不完全型AIS,其原因主要是雄激素受体(androgen receptor,AR)基因的突变导致其对雄激素产生抵抗和不应答。本文回顾南京医科大学附属妇产医院2例CAIS患者的临床资料及诊疗过程,以期能进一步提高对该病的认知及诊治水平。 相似文献
53.
李玉霞 《中国医学文摘.耳鼻咽喉科学》2021,(2):142-143,146
目的探讨磁共振结合高分辨率CT在中耳乳突炎患者术前评估中的临床应用。方法选取我院2018年11月~2020年12月接收患有中耳乳突炎的患者40例为研究对象,所有患者均采用磁共振以及高分辨率CT进行诊断检查,比较两组患者诊断后手术特征显示度。结果诊断后,磁共振联合高分辨率CT检查图像显示度高于单独使用磁共振或高分辨率CT诊断(P<0.05)。结论使用磁共振结合高分辨率CT对中耳乳突炎患者进行术前评估,显示度较高,提高诊断准确度,值得推广。 相似文献
54.
Soosai Manickam Amirtham Ozlem Ozbey Upasana Kachroo Boopalan Ramasamy Elizabeth Vinod 《Clinical anatomy (New York, N.Y.)》2020,33(3):343-349
Bone containing tissues such as osteochondral joint are resistant to routine tissue processing, therefore require decalcification. This technique causes removal of mineral salts, but in the process may macerate the organic tissue, hence the need for tissue fixation. Such severe processing demands careful antigen retrieval to necessitate optimal staining. The aim of our study was to compare five different antigen retrieval protocols (heat retrieval and protein digestion) following decalcification of rabbit knee joints using two different techniques (20% formic acid and 10% ethylenediamine-tetra acetic acid: EDTA). Osteochondral sections were compared based on time required for decalcification, ease of sectioning, morphological integrity using HE staining and antigen preservation (Collagen type II) using immunohistochemistry. The two decalcification solutions did not impair the tissue morphology and ease of sectioning. Joints processed with formic acid decalcified four times faster than EDTA. Among the five antigen retrieval approaches, maximal collagen II uptake with minimal nonspecific staining was found with protein digestion (pronase and hyaluronidase) in both formic acid and EDTA sections. For osteo-chondral sections, we recommend using 10% EDTA for decalcification and pronase plus hyaluronidase for antigen retrieval if maintaining tissue morphology is crucial, whereas if time is of the essence, 20% FA with pronase plus hyaluronidase is the faster option while still preserving structural integrity. Clin. Anat. 33:343–349, 2020. © 2019 Wiley Periodicals, Inc. 相似文献
55.
56.
57.
Background and study aims
Acute upper gastrointestinal bleeding is one of the main causes of hospitalisation. The purpose of this study was to determine the prognostic factors in non-variceal upper gastrointestinal bleeding.Patients and methods
Clinical outcomes, demographic and laboratory variables of the subjects were collected from the HIS software and national code with the SQL format from three hospitals in Qazvin. The data were linked to the database software designed by the author. Clinical and upper endoscopic findings of patients’ records were collected through a questionnaire form in the designed software database.Results
In this study, 29.2% of patients with favourable outcome and 64.2% of patients with unfavourable clinical outcomes had a history of anticoagulant drug use before hospitalisation (p?<?0.001). The prevalence of chronic cardiovascular disease, chronic liver disease, chronic lung disease, diabetes and dialysis was higher in subjects with poor clinical outcomes than those with a favourable clinical outcome.53.1% of subjects with favourable clinical outcome and 90.5% of subjects with undesirable clinical outcomes received packed red blood cell transfusion (p?<?0.001). 16.1% of subjects with desirable clinical outcome and 86.3% of subjects with undesirable clinical outcomes received endoscopic haemostatic treatment which was statistically significant (p?<?0.001).Conclusion
Undesirable clinical outcome in patients with acute non-variceal upper gastrointestinal bleeding has a significant statistical association with longer hospitalisation, chronic underlying disease, anticoagulant administration, packed red blood cell infusion, higher Forrest stage, low systolic blood pressure, higher age, low haemoglobin, low platelet count, high INR and high BUN at the onset of diagnosis. 相似文献58.
59.
60.
Rocco Spagnuolo Alessandro Corea Mariantonietta Blumetti Alessia Giovinazzo Massimiliano Serafino Caterina Pagliuso Raffaele Pagnotta Grazia Curto Cristina Cosco Vincenzo Cosco Rosellina Margherita Mancina Pietro Garieri Anna Papaleo Laura Grande Anna Barilaro Eugenio Garofalo Andrea Bruni Patrizia Doldo 《Journal of advanced nursing》2020,76(11):2993-3002