全文获取类型
收费全文 | 19199篇 |
免费 | 1621篇 |
国内免费 | 30篇 |
专业分类
耳鼻咽喉 | 293篇 |
儿科学 | 894篇 |
妇产科学 | 558篇 |
基础医学 | 2565篇 |
口腔科学 | 864篇 |
临床医学 | 2229篇 |
内科学 | 3773篇 |
皮肤病学 | 491篇 |
神经病学 | 1709篇 |
特种医学 | 575篇 |
外科学 | 2378篇 |
综合类 | 115篇 |
一般理论 | 5篇 |
预防医学 | 1406篇 |
眼科学 | 371篇 |
药学 | 1158篇 |
中国医学 | 23篇 |
肿瘤学 | 1443篇 |
出版年
2023年 | 230篇 |
2022年 | 196篇 |
2021年 | 486篇 |
2020年 | 446篇 |
2019年 | 521篇 |
2018年 | 719篇 |
2017年 | 596篇 |
2016年 | 728篇 |
2015年 | 812篇 |
2014年 | 923篇 |
2013年 | 1505篇 |
2012年 | 1382篇 |
2011年 | 1376篇 |
2010年 | 1025篇 |
2009年 | 743篇 |
2008年 | 983篇 |
2007年 | 952篇 |
2006年 | 1060篇 |
2005年 | 963篇 |
2004年 | 851篇 |
2003年 | 782篇 |
2002年 | 736篇 |
2001年 | 250篇 |
2000年 | 179篇 |
1999年 | 224篇 |
1998年 | 280篇 |
1997年 | 227篇 |
1996年 | 207篇 |
1995年 | 162篇 |
1994年 | 160篇 |
1993年 | 144篇 |
1992年 | 96篇 |
1991年 | 99篇 |
1990年 | 67篇 |
1989年 | 53篇 |
1988年 | 63篇 |
1987年 | 38篇 |
1986年 | 37篇 |
1985年 | 39篇 |
1984年 | 50篇 |
1983年 | 48篇 |
1982年 | 42篇 |
1981年 | 42篇 |
1980年 | 41篇 |
1979年 | 25篇 |
1978年 | 21篇 |
1977年 | 31篇 |
1976年 | 17篇 |
1975年 | 17篇 |
1974年 | 18篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Increased arterial stiffness in young normotensive patients with Turner syndrome: associations with vascular biomarkers 下载免费PDF全文
5.
Christos Loizou Göran Laurell Andreas Arvidsson David Lindquist Karin Nylander Katarina Olofsson 《Acta oto-laryngologica》2015,135(10):1058-1064
Conclusion: Recurrent respiratory papillomatosis (RRP) patients with high surgical treatment frequency (≥ 1/year, HF) were significantly younger and had a more widespread laryngeal disease compared to a low frequency treated group (< 1 treatment/year, LF). This study confirms the existence of a clinical RRP group, not primarily related to HPV sub-type, but more care-intensive and in need of more vigilant follow-up. Objectives: RRP is associated with high morbidity due to its influence on breathing and voice. The purpose of this study was to characterize RRP patients in northern Sweden and investigate possible predictor factors affecting therapeutic needs. Method: Patients from the regional referral area (northern Sweden) were categorized for age, disease duration, juvenile or adult onset, profile of disease development, number of surgical sessions in relation to disease duration, laryngeal deposition of papilloma, gender, and HPV sub-types, in order to identify patients with increased need for frequent surgical treatment. Results: The median age of the RRP patients (n = 48) was 44.5 years; 34 (71%) were males and 14 (29%) females, most were infected with HPV 6. Patients with high surgical treatment frequency/year were significantly younger and showed more widespread papillomatous vegetation in the larynx, compared to the low frequency treated group. 相似文献
6.
7.
Zaher H. Sbeity Axel Jaksche Sybille Martin Karin U. Loeffler 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2006,244(7):883-884
Purpose We report a case of periocular subcutaneous macrofilariasis as an initial sign of a systemic Loa loa infection.Methods Thorough history, eye examination and surgical intervention. Parasitological and serological analysis.Results A periocular adult Loa loa worm was extracted from the left upper eyelid in an African student living in Germany after presenting to our department with intermittent attacks of painful lid swelling. Four weeks later he presented with Calabar swellings in his arms without serological evidence of microfilaria and was treated with diethylcarbamazine.Conclusion Due to increasing migration of populations to Europe rare manifestations of ocular loiasis are becoming more common. Intermittent painful eyelid swelling in patients who visited or have lived in Africa should always raise the suspicion of systemic loiasis. 相似文献
8.
Summary Split or full thickness eyelid defects resulting from tumor destruction or surgical excision present a dilemma for plastic and reconstructive surgeons. Full thickness eyelid replacement requires composite grafting of the skin, together with tarsal support of its substitute and mucosa. The flap described by Fricke in 1829 was used for reconstruction of anterior lamella in six lower eyelid defects. In three of our cases chondromucosal grafts taken from nasal septum were utilized for posterior lamella repair. The results have been satisfactory from a functional and cosmetic standpoint. 相似文献
9.
Å. Öst P. Lindström B. Christensson H. Gyllenhammar L. Engstedt 《European journal of haematology》1984,33(2):160-170
A consecutive series of patients (1978–1981) comprising all patients with acute leukaemia from a population of 475000 inhabitants was reviewed. Thus, 94 patients were diagnosed as having acute leukaemia. No patients were lost from follow-up. The incidence figures of ALL and AML differed significantly from those of Sweden as a whole. 9 patients were < 15 years old. The median age of adult patients was 64 years, 60.8% being ≥ 60 years old. Of adult patients with AML, 20% had a preleukaemic history (chronic myeloproliferative disorders, myelodysplastic syndromes and others). None of 6 patients with leukaemia as a metamorphosis of a chronic myeloproliferative disorder achieved a complete remission. The overall remission rate of the remaining adult patients was 25%. Treated patients, 15–39 years old, with AML without any preleukaemic history, had a complete remission rate of 80% compared to 12% for patients ≥ 60 years old with the same diagnosis. Of 60 patients with ‘primary’ AML, 14 were not treated, mainly because of advanced age and complicating diseases. Most of these patients died within a week of admission. 相似文献
10.
Dietmar Georg PhD Bernhard Kroupa Petra Georg Peter Winkler Joachim Bogner Karin Dieckmann Richard Pötter 《Strahlentherapie und Onkologie》2006,182(8):473-480
PURPOSE: To compare commercial treatment-planning systems (TPS) for inverse planning (IP) and to assess constraint variations for specific IMRT indications. MATERIAL AND METHODS: For IP, OTP, XiO and BrainSCAN were used and step-and-shoot intensity-modulated radiotherapy (IMRT) delivery was assumed. Based on identical constraints, IP was performed for a prostate, head and neck, brain, and gynecologic case. IMRT plans were compared in terms of conformity/homogeneity, dose-volume histograms (DVHs), and delivery efficiency. For ten patients each of a class of indications, constraint variations were evaluated. RESULTS: IMRT plans were comparable concerning minimum target dose, homogeneity, conformity, and maximum doses to organs at risk. Larger differences were seen in dose gradients outside the target, monitor units, and segment number. Using help structures proved efficient to shape isodoses and to reduce segmentation workload. For IMRT class solutions, IP constraint variations depended on anatomic site. CONCLUSION: IP systems requiring doses as input and having objective functions based on physical parameters had a very similar performance. Constraint templates can be established for a class of IMRT indications. 相似文献