全文获取类型
收费全文 | 14802篇 |
免费 | 1069篇 |
国内免费 | 497篇 |
专业分类
耳鼻咽喉 | 110篇 |
儿科学 | 179篇 |
妇产科学 | 125篇 |
基础医学 | 1058篇 |
口腔科学 | 102篇 |
临床医学 | 1320篇 |
内科学 | 1356篇 |
皮肤病学 | 71篇 |
神经病学 | 441篇 |
特种医学 | 1101篇 |
外国民族医学 | 8篇 |
外科学 | 3862篇 |
综合类 | 2064篇 |
预防医学 | 238篇 |
眼科学 | 38篇 |
药学 | 645篇 |
22篇 | |
中国医学 | 431篇 |
肿瘤学 | 3197篇 |
出版年
2024年 | 51篇 |
2023年 | 266篇 |
2022年 | 519篇 |
2021年 | 640篇 |
2020年 | 558篇 |
2019年 | 509篇 |
2018年 | 522篇 |
2017年 | 491篇 |
2016年 | 618篇 |
2015年 | 561篇 |
2014年 | 981篇 |
2013年 | 990篇 |
2012年 | 841篇 |
2011年 | 844篇 |
2010年 | 635篇 |
2009年 | 711篇 |
2008年 | 713篇 |
2007年 | 751篇 |
2006年 | 651篇 |
2005年 | 596篇 |
2004年 | 497篇 |
2003年 | 428篇 |
2002年 | 378篇 |
2001年 | 332篇 |
2000年 | 252篇 |
1999年 | 244篇 |
1998年 | 253篇 |
1997年 | 186篇 |
1996年 | 149篇 |
1995年 | 143篇 |
1994年 | 133篇 |
1993年 | 115篇 |
1992年 | 85篇 |
1991年 | 75篇 |
1990年 | 54篇 |
1989年 | 74篇 |
1988年 | 65篇 |
1987年 | 44篇 |
1986年 | 66篇 |
1985年 | 49篇 |
1984年 | 50篇 |
1983年 | 29篇 |
1982年 | 49篇 |
1981年 | 45篇 |
1980年 | 37篇 |
1979年 | 28篇 |
1978年 | 12篇 |
1977年 | 19篇 |
1976年 | 15篇 |
1974年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 9 毫秒
11.
12.
P. D. Tsitsopoulos C. A. Tsonidis K. A. Nanasis K. D. Tsoleka G. N. Tavridis 《Acta neurochirurgica》1995,135(3-4):198-200
Summary This report deals with a case of rhabdomyosarcoma in the upper thoracic spine. It is of particular interest, not only for the rarity of type and location of this tumour, but for its clinical course, which presented fluctuations of neurological status, included an acute demonstration of complete paraplegia followed by full recovery after conservative treatment, and gradual relapsing of neurological deficit, one year later. 相似文献
13.
Dr. J. Tajti MD PhD ; Dr. K. Sas MD ; Dr. D. Szok MD ; Dr. E. Vörös MD ; Dr. L. Vécsei MD DSc 《Headache》1996,36(4):259-260
We report on a patient with clusterlike headache and multiple brain metastases of lung cancer. Initially, cluster headache was suggested clinically by characteristic symptoms without any focal central nervous system signs. However, magnetic resonance imaging demonstrated multiple brain metastases. It is possible that tumor necrosis factor may have played a role in initiating the clusterlike headache. 相似文献
14.
Diagnosis and treatment of thoracic outlet syndrome 总被引:2,自引:0,他引:2
Masataka Abe Tadashi Shimamura Jun Nishida Katsuaki Ichinohe 《Journal of orthopaedic science》1997,2(2):119-127
Patients who develop symptoms of thoracic outlet syndrome (TOS) have a predisposing anatomic abnormality. In most patients
with TOS, the symptoms are caused by entrapment of the brachial plexus and they do not arise from compression of the subclavian
artery, as was previously thought. The tests advocated for diagnosing this common syndrome (i.e., evaluating the positional
compression of the artery when the arms are raised, the neck is turned, or the shoulders are braced) cannot accurately diagnose
this syndrome. There are two reasons for this. The symptoms of TOS are not related to the compression of the artery in the
outlet in 98% of patients, and 75% of normal individuals without symptoms show diminished radial pulse on various provocation
tests. We employed four timed provocation tests (minute tests) to diagnose TOS: the timed Morley test, timed Wright test,
timed Eden test, and elevated arm stress exercise, all of which are very sensitive. In normal individuals without symptoms,
20% experience transitional symptoms such as slight pain and tiredness, on these tests indicating a subclinical state. TOS
is treated by keeping the thoracic outlet wide, this being done either conservatively or surgically. In 1993 and 1994, we
conservatively treated 418 of 422 patients with TOS by means of active exercise, a brace, and by block therapy. These measures
did not reduce the symptoms in 23 of these patients, so surgical treatment was indicated. In the remaining 4 of the 422 patients,
conservative treatment was not indicated and surgery was performed directly. All the patients showed significant clinical
improvement of varying degree.
Presented at the 69th Annual Meeting of the Japanese Orthopaedic Association, Tokyo, April 12, 1996 相似文献
15.
16.
目的:探讨全肺放疗治疗肺转移癌的价值.方法:1999年3月~2003年5月我院肿瘤科收治24例双肺多发肺转移癌患者,均给予全肺放疗.现对这些患者的临床资料进行总结分析.结果:本组放疗结束时转移瘤CR率为37.5%(9/24),PR率为50.0%(12/24),有效率(PR+CR)达87.5%.原发肿瘤为鼻咽癌、乳腺癌、肝癌、结直肠癌的中位生存期分别为13.5、22.0、10.5月、8.5月.1~2级放射性肺炎发生率为25.0%(6/24);3级为16.7%(2/24);4~5级为0.结论:恶性肿瘤肺多发转移可以采用全肺放疗+局部小野补量治疗,尤其适用于原发肿瘤对放疗中高度敏感、化疗无效的患者,可获得较好疗效.毒副作用可耐受. 相似文献
17.
18.
放射治疗71例骨转移癌止痛效果分析 总被引:2,自引:0,他引:2
目的观察低于常规剂量的2种分割方式治疗骨转移性疼痛的疗效。方法71例恶性肿瘤晚期骨转移患者,总计93处骨转移灶,根据疼痛程度及行动受限程度,采取2种均低于常规剂量的分割方式进行放射治疗,分别为Dm30Gy/10f/2W,Dm30Gy/6f/2W。观察疼痛缓解情况。结果2种分割方式止痛有效率分别为88%、95%。两组间无显著差异性(P>0.05)。与国内多数文献报告的结果接近。结论低于常规剂量的分割方式对转移性骨痛疗效与常规剂量的分割方式的疗效相当,且简便易行。 相似文献
19.
老年性骨质疏松脊柱良性骨折与转移瘤性骨折的MRI鉴别 总被引:13,自引:0,他引:13
目的探讨脊椎骨质疏松性压缩骨折的MRI表现及其与转移性压缩骨折的鉴别诊断.资料与方法回顾性分析53例老年性骨质疏松伴压缩性骨折和20例转移性椎体压缩骨折患者的MRI资料.全部病例均行常规MRI检查(矢状位、横轴位).分析两者引起的压缩骨折MRI征象,包括椎体和椎弓根的形态及信号改变、椎间盘增厚、椎体内真空现象和椎旁软组织形态.探讨两者之间的差别.结果两者在椎体和椎弓根形态及信号、椎体内真空现象、椎旁软组织形态上存在非常显著性差异(P<0.01).结论 MRI能准确显示骨质疏松性压缩骨折的形态及信号,与转移瘤之间有显著差异,大多能对二者做出鉴别诊断. 相似文献
20.
EFNS Guidelines on diagnosis and treatment of brain metastases: report of an EFNS Task Force 总被引:2,自引:0,他引:2
R. Soffietti P. Cornu J. Y. Delattre R. Grant F. Graus W. Grisold J. Heimans J. Hildebrand P. Hoskin M. Kalljo P. Krauseneck C. Marosi T. Siegal C. Vecht 《European journal of neurology》2006,13(7):674-681
The objectives have been to establish evidence-based guidelines and identify controversies regarding the management of patients with brain metastases. The collection of scientific data was obtained by consulting the Cochrane Library, bibliographic databases, overview papers and previous guidelines from scientific societies and organizations. A tissue diagnosis is necessary when the primary tumor is unknown or the aspect on computed tomography/magnetic resonance imaging is atypical. Dexamethasone is the corticosteroid of choice for cerebral edema. Anticonvulsants should not be prescribed prophylactically. Surgery should be considered in patients with up to three brain metastases, being effective in prolonging survival when the systemic disease is absent/controlled and the performance status is high. Stereotactic radiosurgery should be considered in patients with metastases of 3–3.5 cm of maximum diameter. Whole-brain radiotherapy (WBRT) after surgery or radiosurgery is debated: in case of absent/controlled systemic cancer and Karnofsky Performance score of 70 or more, one can either withhold initial WBRT or deliver early WBRT with conventional fractionation to avoid late neurotoxicity. WBRT alone is the treatment of choice for patients with single or multiple brain metastases not amenable to surgery or radiosurgery. Chemotherapy may be the initial treatment for patients with brain metastases from chemosensitive tumors. 相似文献