全文获取类型
收费全文 | 71803篇 |
免费 | 6195篇 |
国内免费 | 3428篇 |
专业分类
耳鼻咽喉 | 1297篇 |
儿科学 | 865篇 |
妇产科学 | 867篇 |
基础医学 | 9941篇 |
口腔科学 | 1305篇 |
临床医学 | 7837篇 |
内科学 | 12528篇 |
皮肤病学 | 1528篇 |
神经病学 | 4542篇 |
特种医学 | 3799篇 |
外国民族医学 | 24篇 |
外科学 | 8294篇 |
综合类 | 6505篇 |
现状与发展 | 13篇 |
一般理论 | 12篇 |
预防医学 | 3730篇 |
眼科学 | 1818篇 |
药学 | 7198篇 |
41篇 | |
中国医学 | 2744篇 |
肿瘤学 | 6538篇 |
出版年
2024年 | 184篇 |
2023年 | 968篇 |
2022年 | 2555篇 |
2021年 | 3596篇 |
2020年 | 2499篇 |
2019年 | 2461篇 |
2018年 | 2597篇 |
2017年 | 2281篇 |
2016年 | 2465篇 |
2015年 | 3594篇 |
2014年 | 4186篇 |
2013年 | 4127篇 |
2012年 | 5982篇 |
2011年 | 6154篇 |
2010年 | 3858篇 |
2009年 | 3119篇 |
2008年 | 4063篇 |
2007年 | 3852篇 |
2006年 | 3581篇 |
2005年 | 3337篇 |
2004年 | 2494篇 |
2003年 | 2252篇 |
2002年 | 1910篇 |
2001年 | 1261篇 |
2000年 | 1202篇 |
1999年 | 1231篇 |
1998年 | 705篇 |
1997年 | 677篇 |
1996年 | 505篇 |
1995年 | 462篇 |
1994年 | 411篇 |
1993年 | 243篇 |
1992年 | 403篇 |
1991年 | 314篇 |
1990年 | 296篇 |
1989年 | 270篇 |
1988年 | 227篇 |
1987年 | 204篇 |
1986年 | 177篇 |
1985年 | 132篇 |
1984年 | 98篇 |
1983年 | 78篇 |
1982年 | 32篇 |
1981年 | 47篇 |
1980年 | 28篇 |
1979年 | 45篇 |
1978年 | 24篇 |
1977年 | 28篇 |
1976年 | 35篇 |
1974年 | 31篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
目的:探讨布一加综合征的诊治经验。方法:回顾分析本院自1993年-2002年,采用超声介入及手术方法治疗48例布加综合征的疗法结果。超声引导下支架术治疗布一加综合征38例,其中内支架术联脾肾分流术治疗5例,支架术联合肠腔分流术治疗8例;腔房人工血管转流术治疗4例,肠腔转流术治疗2例,肠颈转流术治疗2例,经右心房联合破膜2例。结果:随访1个月-9年,平均4.68年,37例获显疗效,2例改善,6例行二次手术治疗,3例死亡。结论:应重视早期诊断和治疗。腔内超声介入方法治疗布一加综合征,简便、准确、安全、疗效肯定;联合分流术解除肝静脉梗阻,可获得满意疗效。 相似文献
62.
Pradip K. Rustagi Tin Han Lynn Ziolkowski Deborah L. Farolino Mark S. Currie Gerald L. Logue 《British journal of haematology》1987,66(4):461-465
The anti-granulocyte activity of serum from patients with B-cell chronic lymphocytic leukaemia (CLL) and other lymphoproliferative disorders was investigated. Granulocyte-binding IgG was measured in 34 patients with CLL, 13 patients with hairy cell leukaemia, one patient with prolymphocytic leukaemia, two patients with Sézary cell leukaemia, and seven patients with chronic T-cell lymphocytosis who had a predominance of circulating large granular lymphocytes. Anti-granulocyte activity was absent in CLL and its variants, but present in the majority of granulocytopenic patients with chronic T-cell lymphocytosis. In one of these patients, granulocytopenia was associated with complement-activating IgG granulocyte antibody. Thus, antibody-mediated granulocyte injury appears to be an unusual occurrence in chronic lymphocytic leukaemia, but is a frequent complication of chronic T-cell lymphocytosis. 相似文献
63.
64.
荷包环扎式结直肠吻合保肛术治疗低位直肠癌* 总被引:1,自引:1,他引:0
目的 :评价荷包环扎式结直肠吻合保肛术治疗低位直肠癌的价值。方法 :对低位直肠癌采用荷包环扎结直肠吻合保肛术治疗 2 3例 (A组 ) ,采用Miles手术治疗 2 6例 (B组 )。结果 :A组术后 1、3年生存率分别为 10 0 % (2 3/ 2 3) ,95 7% (2 2 / 2 3) ,术后无局部复发病例 ;排便功能优 16例 (6 9 6 % ) ,良 7例 (30 4 % )。B组术后 1、3年生存率分别为 10 0 % (2 6 / 2 6 ) ,96 2 % (2 5 /2 6 ) ,术后局部复发率 3 8% (1/ 2 6 )。两组术后 1、3年生存率 ,局部复发率经统计检验 ,均无显著差异 (P值均 >0 0 5 )。术后并发症 :A组无吻合口瘘及吻合口狭窄发生 ,盆腔感染 1例。B组 :切口感染 1例 ,人工肛门狭窄 1例。结论 :采用螺纹支架管荷包环扎结直肠吻合保肛术治疗低位直肠癌既能达到根治目的 ,又有保留肛门的良好排便功能 ,且并发症少 ,操作简便易行 ,不用特殊器械 ,值得推广应用 相似文献
65.
Paclitaxel with Cisplatin as Salvage Treatment for Patients with Previously Treated Advanced Transitional Cell Carcinoma of the Urothelial Tract
下载免费PDF全文
![点击此处可从《Neoplasia (New York, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
66.
Ho-Seong Han Jai Young Cho Yoo-Seok Yoon 《Journal of hepato-biliary-pancreatic sciences》2009,16(4):427-432
Many studies have recently reported on laparoscopic liver resection, although its development has been slow compared to laparoscopy in other fields. The indications for the location of laparoscopic liver resection have previously been limited to easily accessible lesions. Performing laparoscopic liver resection in the posterior and superior parts of the liver has been considered difficult due to inadequate exposure, the poor operative field and the difficulty with parenchymal dissection. Flexible endoscopy, high definition imaging and various kinds of equipment for parenchymal transection have been introduced for clinical use. In addition, much experience with this procedure has been accumulated at many centers. Accordingly, there are an increasing number of reports on laparoscopic liver resection in difficult locations. At our institution, the location of the tumor is no longer a limitation to laparoscopic liver resection. However, for safer laparoscopic liver resection, the patient positioning and trocar placement should be individualized according to the tumor location. The type of resection also may depend on the remaining liver’s functional capacity. We describe here the technical considerations for performing laparoscopic liver resection, including the technical considerations for performing laparoscopic liver resection for lesions located in the postero-superior segments of the liver. 相似文献
67.
心血管疾病并发焦虑抑郁症状2050例心理干预治疗分析 总被引:13,自引:1,他引:12
目的:了解心血管疾病并发焦虑抑郁症状的情况并探讨心理干预等对焦虑抑郁症状的影响。方法:对住院的2050例心血管疾病并发焦虑抑郁症状的患者进行回顾性分析。结果:心血管疾病患者中并发有焦虑抑郁症状者占56%;其常表现为类似心绞痛、左心衰竭症状,可并发有心律失常;高血压病并发有焦虑抑郁患者对血压升高的耐受性差,动态血压检查以非勺型改变者居多;单纯使用心血管药物治疗效果欠佳,心理干预,焦虑抑郁症状严重者结合抗焦虑抑郁药物疗效显著。结论:心血管疾病患者常并发焦虑抑郁症状,心理干预治疗等可有效改善患者的症状。 相似文献
68.
目的 合理应用影像学检查,探讨腰腿痛的病因诊断,为临床治疗提供依据.方法 对38例腰腿痛患者进行随访,观察普通照片后经CT、MRI及B超等复查的最后诊断,对比进行分析.结果 单纯普通照片对椎间盘脱出、椎管狭窄、骶部硬膜外囊肿、股骨头无菌坏死、梨状肌损伤等疾病缺乏直接征象,不能作为诊断依据.结论 应用CT、MRI现代影像技术,同时借助B超、肌电图等相关检查,是确诊腰腿痛病因的有效方法. 相似文献
69.
70.
Previous studies using the technique of microinjection into brain nuclei indicated that the periaqueductal gray (PAG), nucleus accumbens, habenula and amygdala play an essential role in pain modulation and that these nuclei possibly act through a ‘mesolimbic neural loop‘ to exert an analgesic effect, in which Met-enkephalin (MEK) and β-endorphin (β-EP) have been implicated as the two major opioid peptides involved in antinociception. In the present study performed in rabbits, intracranial microinjection was supplemented with push-pull perfusion and radioimmunoassay to determine whether the release of enkephalins (ENK) and β-EP was increased in these nuclei when the putative neural circuit was activated by morphine administered into one of the nuclei. The results showed: (1) microinjection of morphine into the PAG increased the release of ENK and β-EP in the N. accumbens, and vice versa; (2) microinjection of morphine into the N. accumbens increased the release of ENK and β-EP in the amygdala, and vice versa; (3) morphine microinjected into the PAG caused an increase in the release of ENK and β-EP in the amygdala and vice versa, although the release of ENK in PAG was statistically not significant. These results indicate that PAG, N. accumbens and amygdala are connected in a network served by a positive feedback circuitry. 相似文献