全文获取类型
收费全文 | 160489篇 |
免费 | 10936篇 |
国内免费 | 628篇 |
专业分类
耳鼻咽喉 | 1779篇 |
儿科学 | 3930篇 |
妇产科学 | 2632篇 |
基础医学 | 21333篇 |
口腔科学 | 3421篇 |
临床医学 | 15703篇 |
内科学 | 34150篇 |
皮肤病学 | 3289篇 |
神经病学 | 14750篇 |
特种医学 | 7010篇 |
外国民族医学 | 14篇 |
外科学 | 25408篇 |
综合类 | 1963篇 |
一般理论 | 109篇 |
预防医学 | 11917篇 |
眼科学 | 3323篇 |
药学 | 10208篇 |
中国医学 | 239篇 |
肿瘤学 | 10875篇 |
出版年
2023年 | 895篇 |
2022年 | 1500篇 |
2021年 | 3415篇 |
2020年 | 2098篇 |
2019年 | 3144篇 |
2018年 | 3630篇 |
2017年 | 2833篇 |
2016年 | 3186篇 |
2015年 | 3642篇 |
2014年 | 5147篇 |
2013年 | 6904篇 |
2012年 | 10446篇 |
2011年 | 11094篇 |
2010年 | 6352篇 |
2009年 | 6058篇 |
2008年 | 9787篇 |
2007年 | 10234篇 |
2006年 | 10144篇 |
2005年 | 10201篇 |
2004年 | 9360篇 |
2003年 | 8675篇 |
2002年 | 8330篇 |
2001年 | 2210篇 |
2000年 | 1886篇 |
1999年 | 2173篇 |
1998年 | 1941篇 |
1997年 | 1570篇 |
1996年 | 1339篇 |
1995年 | 1267篇 |
1994年 | 1138篇 |
1993年 | 1028篇 |
1992年 | 1320篇 |
1991年 | 1217篇 |
1990年 | 1082篇 |
1989年 | 1014篇 |
1988年 | 943篇 |
1987年 | 911篇 |
1986年 | 911篇 |
1985年 | 895篇 |
1984年 | 939篇 |
1983年 | 814篇 |
1982年 | 965篇 |
1981年 | 871篇 |
1980年 | 739篇 |
1979年 | 680篇 |
1978年 | 663篇 |
1977年 | 543篇 |
1976年 | 526篇 |
1974年 | 527篇 |
1973年 | 461篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
Comparison of ThinPrep versus conventional smear cytopreparatory techniques for fine-needle aspiration specimens of head and neck masses. 总被引:2,自引:0,他引:2
Lloyd Ford Barry M Rasgon Raymond L Hilsinger Raul M Cruz Karen Axelsson Gregory J Rumore Thomas M Schmidtknecht Balaram Puligandla John Sawicki William Pshea 《Otolaryngology--head and neck surgery》2002,126(5):554-561
OBJECTIVES: Diagnostic accuracy of the ThinPrep process (Cytyc, Boxborough, MA) was compared with that of conventional (smear) cytopreparation for fine-needle aspiration (FNA) of head and neck masses. METHODS: In a prospective, randomized, single-blinded study, 209 patients served as their own controls and underwent 236 FNAs using ThinPrep and conventional (smear) cytopreparatory techniques. RESULTS: ThinPrep produced less air-drying artifact and less mechanical distortion than the conventional method. The conventional technique was diagnostic in 63% of samples; the ThinPrep technique was diagnostic in 55% of samples. When all results were combined, pathologists subjectively preferred the conventional technique but accepted use of ThinPrep as the only cytopreparatory technique for most head and neck masses. CONCLUSIONS: For adequately experienced cytopathologists, ThinPrep is acceptable for FNA of salivary masses, neck cysts, metastatic lymph nodes, and thyroid lesions. Conventional smear technique should be used for FNA of nonmetastatic lymphoid lesions. Use of ThinPrep can complement use of the conventional (smear) cytopreparatory technique when aspirate is nondiagnostic or bloody, when the patient has a blood-borne infectious disease, when the clinician is inexperienced, or when aspirate has entered the syringe. 相似文献
42.
43.
Paul Hochstein Ulrich Glatzel Thomas Schmickal Andreas Wentzensen 《Trauma und Berufskrankheit》2002,4(2):s110-s114
The treatment of deep cartilage defects in load-bearing joints is a problem that still has no satisfactory solution. Full-thickness defects of the articular cartilage rarely heal spontaneously, usually leaving damage that can lead to early arthrosis. Techniques currently available for the treatment of chondral defects include abrasion, drilling, micro-fracturing, transplantation of tissue autografts and allografts, and cell transplantation. Osteochondral autograft transplantation is currently the only surgical cartilage repair technique known to lead to the formation of genuine hyaline articular cartilage and its retention at least in the medium term. The Draenert method, in which a water-cooled diamond bone-cutting system is used, is an effective procedure for resurfacing the joints affected by localised cartilaginous defects, even when there is also severe bone loss. Donor-side morbidity can be kept to a minimum by filling the defect caused by harvesting with a press-fit cylinder of cancellous bone covered with periosteum for protection. 相似文献
44.
Frank Lindseth Thomas Lang? Jon Bang Toril A Nagelhus Hernes 《Computer aided surgery》2002,7(4):197-222
45.
46.
47.
Ronald Martin Jaime Williams Thomas Hadjistavropoulos Heather D Hadjistavropoulos Michael MacLean 《Revue canadienne de recherche en sciences infirmières》2005,37(2):142-164
The literature suggests that pain in the elderly, especially among seniors with dementia, is under-assessed and under-treated.This qualitative study solicited the perspectives of seniors, front-line nursing staff, nursing-home administrators, and informal caregivers of seniors with dementia on the current status of pain assessment and management. The views of these participants complement the research findings reported in the literature. While some of their explanations and potential solutions concerning under-treatment of pain in seniors echo views that have been presented in the literature, the participants also pointed to factors and avenues that have been given less formal consideration (e.g., systemic barriers to effective assessment and treatment of pain).They also highlighted the need for pain-control strategies beyond medication. The implications of these findings are discussed. 相似文献
48.
49.
Treatment of thrombocytopenia with alfa interferon 总被引:1,自引:0,他引:1
A M Lever M G Brook I Yap H C Thomas 《British medical journal (Clinical research ed.)》1987,295(6612):1519-1520
50.
Trawat Attarbaschi Julia Sacher Thomas Geiss-Granadia Nikolas Klein Nilufar Mossaheb Rupert Lanzenberger Susanne Asenbaum Robert Dudczak Siegfried Kasper Johannes Tauscher 《European neuropsychopharmacology》2007,17(2):102-107
We explored the relationship between striatal dopamine-2 (D(2)) receptor occupancy and extra-pyramidal symptoms (EPS) in bipolar patients receiving olanzapine. Seventeen patients with a DSM-IV diagnosis of bipolar disorder were treated with 5-45 mg/day olanzapine for at least 14 days. After that period, D(2) receptor occupancy was determined using Iodobenzamide (IBZM) and SPECT. EPS were assessed by the Simpson-Angus Scale (SAS) and Barnes-Akathisia Scale (BAS). We found a dose-dependent increase in occupancy: 5 mg led to 28-50%, 10 mg to 40-68%, 15 mg to 69%, 20 mg to 57-66%, 30 mg to 66% and 45 mg to 80% D(2) receptor occupancy; and a significant correlation between plasma levels and occupancy (R(2)=.55, P=.001). Similar to schizophrenic patients, bipolar patients did not exhibit EPS at D(2) occupancy levels of 28 to 80%. Although we did not find an increased vulnerability for acute EPS in bipolar patients receiving olanzapine at clinical relevant doses, this needs to be replicated with larger sample sizes. 相似文献