全文获取类型
收费全文 | 12887篇 |
免费 | 1157篇 |
国内免费 | 1036篇 |
专业分类
耳鼻咽喉 | 118篇 |
儿科学 | 152篇 |
妇产科学 | 108篇 |
基础医学 | 1640篇 |
口腔科学 | 282篇 |
临床医学 | 1787篇 |
内科学 | 2010篇 |
皮肤病学 | 80篇 |
神经病学 | 697篇 |
特种医学 | 448篇 |
外国民族医学 | 10篇 |
外科学 | 1176篇 |
综合类 | 2268篇 |
现状与发展 | 2篇 |
一般理论 | 1篇 |
预防医学 | 722篇 |
眼科学 | 368篇 |
药学 | 1408篇 |
12篇 | |
中国医学 | 693篇 |
肿瘤学 | 1098篇 |
出版年
2024年 | 50篇 |
2023年 | 270篇 |
2022年 | 603篇 |
2021年 | 690篇 |
2020年 | 482篇 |
2019年 | 447篇 |
2018年 | 467篇 |
2017年 | 446篇 |
2016年 | 403篇 |
2015年 | 589篇 |
2014年 | 739篇 |
2013年 | 645篇 |
2012年 | 940篇 |
2011年 | 1143篇 |
2010年 | 597篇 |
2009年 | 512篇 |
2008年 | 665篇 |
2007年 | 626篇 |
2006年 | 668篇 |
2005年 | 693篇 |
2004年 | 442篇 |
2003年 | 368篇 |
2002年 | 336篇 |
2001年 | 254篇 |
2000年 | 269篇 |
1999年 | 354篇 |
1998年 | 226篇 |
1997年 | 220篇 |
1996年 | 140篇 |
1995年 | 145篇 |
1994年 | 106篇 |
1993年 | 77篇 |
1992年 | 78篇 |
1991年 | 76篇 |
1990年 | 75篇 |
1989年 | 51篇 |
1988年 | 41篇 |
1987年 | 23篇 |
1986年 | 33篇 |
1985年 | 36篇 |
1984年 | 25篇 |
1983年 | 11篇 |
1982年 | 5篇 |
1981年 | 5篇 |
1980年 | 2篇 |
1979年 | 6篇 |
1976年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
OBJECTIVE: To find out the prevalence of pneumatization of perpendicular plate of the ethmoid bone, and to discuss the diagnosis and management of perpendicular plate mucocele (nasal septal mucocele). METHODS: The CT data from 32 patients with septal deviation were reviewed, and an unusual case of perpendicular plate mucocele was reported. RESULTS: Six cases (6/32, 18%) were found to have pneumatization of perpendicular plate of the ethmoid bone, with 2 located in the anterior portion (frontal-septal pneumatization), and 4 located in the posterior portion (spheno-septal pneumatization). A patient with perpendicular plate mucocele was treated by the technique of marsupialization under nasal endoscope. This patient was followed-up for 10 months without recurrence. CONCLUSION: As a kind of variation of nasal septum, the clinical significance of pneumatization of perpendicular plate should be emphasized. We reported the first case of perpendicular plate mucocele, originated possibly from the pneumatization of perpendicular plate of the ethmoid bone. Marsupialization under endoscope was considered to be the initial management for this unusual disease. 相似文献
82.
83.
郁金饮片炮制历史沿革及现代研究 总被引:2,自引:0,他引:2
对郁金的植物资源、饮片炮制沿革、化学成分及药理活性的研究进行了分析和总结,并讨论郁金与姜黄、莪术的品种关系,为郁金饮片炮制规范化及建立质量标准提供借鉴。 相似文献
84.
1999至2001年广州地区临床常见肠杆菌科细菌耐药性监测结果分析 总被引:5,自引:1,他引:5
目的 了解临床分离常见肠杆菌科细菌的耐药性。方法 统一采用纸片扩散法进行实验,以美国NCCLS文件为判断标准,每次监测均有质控数据。结果 共有11家广州市三级甲等医院实验室参加耐药性监测,三年共统计临床常见肠杆菌科细菌3147株。结论 对肠杆菌科细菌,亚胺培南的耐药率最低,可考虑为临床首选药物,阿米卡星、头孢他啶耐药率相对较低,可选择用药。庆大霉素的耐药率有逐年下降的趋势,将来可能成为临床一线药。而磺胺甲噁唑/甲氧苄啶、四环素、萘啶酸等耐药率相对较高,应慎用。氨节西林的耐药率很高,应避免使用。 相似文献
85.
86.
87.
88.
Yanfang Li Menda LP Qiuliang WU Fuyuan Liu Jundong Li Jinglin Zou Yongwen Huang 《中国肿瘤临床(英文版)》2004,1(3):180-184
Objective Ovarian dysgerminoma is an uncommon ovarian malignancy, Its clinicai features are special and there are many factors affecting
its prognosis. If treated properly, the patient can be cured. Otherwise it may endanger the patient’s life. The aim of this
study is to investigate the clinical features and factors related to prognosis of ovarian dysgerminoma.
Methods Data from 57 patients with pure ovarian dysgerminoma were analyzed retrospectively. The patients were admitted to the Cancer
Center, Sun Yat-sen University from January 1.1964 to December 31, 2000.
Results The main clinical features were abdominal mass (56.1% ), abdominal pain (21.1% ), abdominal swelling (17.5%.), vaginal bleeding
(5.3% )and genital tract abnormalities (5.3%). Twenty-six patients had stage I diseases, 8 stage II.9 stage III.1 stage IV
and 13 recurrent and persistent diseases. The uterus was involved in 41.2% of patients with stage II -III diseases. Combined
modality was given to 52 cases and a single-method treatment to 5 cases. The total overall 5 and 10-year survival rates for
stages I-IV was 80.1 % and 70.0% respectively. The 5-year survival rate for stage I was 100%, stage II 55.2%. stage III 55.6%
and stage IV 0%; for recurrent and persistent diseases, 72.7%. The stage I group of 12 patients. received adnexectomy and
14 patients underwent hysterectomy and adnexa removal. There was no significant difference between the 5 and 10-year survival
rates (all 100%). Of the 23 patients in the stage I group to whom oniy chemotherapy was given after operation, 19 cases received
3 or more courses and were well without recurrence; 4 patients received only one course and one of them recurred 21 months
after the operation. In the group of stages II and III cases, the 5-year survival rate was 86.7% for those whose chemotherapy
courses were 3≥ 4 and 25.0% for patients who received less than 4 courses of chemotherapy (P<0.05).
Conclusions The prognosis of ovarian dysgerminoma is closely related to the disease stage and treatment modality. A fertility-preserving
operation can be considered in early -staged patients, but caution needs to be exercised in the middle to late staged cases.
Good results can be achieved with an operation-based combined modality in recurrent patients. 相似文献
89.
216例恶性阻塞性黄疸患者手术疗效的因素分析 总被引:10,自引:0,他引:10
目的 探讨影响恶性阻塞性黄疸临床治疗的预后因素。方法 对1990年1月~1997年12月216例恶性阻塞性黄疸手术患者的17种临床指标进行分析。结果 173例(80.1%)手术后1个月存活,发生并发症81例,发生率37.5%。台术者胆管炎、胆瘘、出血、肾功能衰竭等并发症均高于姑息术者,差异均有显著性(P〈0.01);1月生存率和术后并发症发生率与ASA分级、黄疸持续的时间等有明显关系(P〈0.01 相似文献
90.
龙参颗粒的质量标准研究 总被引:2,自引:0,他引:2
目的:为龙参颗粒提供方便可行的质量控制方法。方法:采用薄层色谱法进行定性鉴别;用HPLC法对成品中苦参碱进行含量测定。结果:薄层层析可成功鉴别出当归和黄芪药材;Hypersil NH_2,色谱柱(4.6mm×200mm,5μm);柱温:25℃;流动相:乙腈-0.02mol/L磷酸二氢钠(82:18);流速:1mL/min;检测波长:215nm。加样回样率为97.70%,RSD为1.56%。结论:本实验方法基本可控制龙参颗粒的质量。 相似文献