首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   14633篇
  免费   1005篇
  国内免费   549篇
耳鼻咽喉   214篇
儿科学   86篇
妇产科学   196篇
基础医学   339篇
口腔科学   170篇
临床医学   1284篇
内科学   2692篇
皮肤病学   96篇
神经病学   283篇
特种医学   258篇
外国民族医学   4篇
外科学   5277篇
综合类   2020篇
预防医学   378篇
眼科学   140篇
药学   694篇
  22篇
中国医学   101篇
肿瘤学   1933篇
  2024年   35篇
  2023年   330篇
  2022年   603篇
  2021年   763篇
  2020年   680篇
  2019年   564篇
  2018年   532篇
  2017年   543篇
  2016年   652篇
  2015年   602篇
  2014年   1200篇
  2013年   984篇
  2012年   918篇
  2011年   996篇
  2010年   734篇
  2009年   742篇
  2008年   746篇
  2007年   705篇
  2006年   590篇
  2005年   512篇
  2004年   422篇
  2003年   311篇
  2002年   263篇
  2001年   219篇
  2000年   170篇
  1999年   175篇
  1998年   143篇
  1997年   120篇
  1996年   119篇
  1995年   119篇
  1994年   116篇
  1993年   72篇
  1992年   51篇
  1991年   51篇
  1990年   35篇
  1989年   45篇
  1988年   39篇
  1987年   29篇
  1986年   45篇
  1985年   28篇
  1984年   42篇
  1983年   16篇
  1982年   28篇
  1981年   19篇
  1980年   14篇
  1979年   16篇
  1978年   14篇
  1977年   10篇
  1976年   7篇
  1973年   6篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
目的分析和总结残胃癌的外科诊断、治疗及预后情况。方法对1990年以来收治的35例残胃癌的发病率、临床表现、治疗情况和预后进行回顾性分析。结果首次胃切除以胃溃疡为主,占65.7%,首次手术BillrothⅡ式占82.9%(29/35)。残胃癌早期缺乏特异的症状,主要为上腹部隐痛不适,首次手术距临床诊断残胃癌的间隔时间平均为16.3年。本组残胃癌手术切除率及根治性切除率分别为77.1%和54.3%,根治性切除患者1、3、5年生存率分为78.9%、52.6%、36.8%,Ⅰ期、Ⅱ期患者的5年生存率为72.7%。结论胃良性病行手术治疗时以BillrothⅠ式为首选,定期胃镜检查是早期诊断残胃癌的关键,根治性切除是治疗残胃癌的有效方法及影响残胃癌预后的重要因素。  相似文献   
13.
神经内镜治疗脑室内病变   总被引:7,自引:2,他引:5  
目的探讨脑室内病变的神经内镜治疗。方法应用神经内镜对68例脑室内病变进行治疗,其中松果体区肿瘤16例,囊性颅咽管瘤15例,丘脑肿瘤14例,脑室内囊肿16例,侵及室管膜下的胼胝体肿瘤3例,侧脑室脉络丛乳头状瘤2例,侧脑室猪囊尾蚴病1例,侧脑室内分流管脱落1例。结果随访17~69个月,56例有效,12例死于肿瘤扩散。无严重并发症。结论对脑室内病变选择性应用神经内镜治疗安全、有效。  相似文献   
14.
经尿道电切与气化切割和激光治疗前列腺增生症的疗效比较   总被引:11,自引:0,他引:11  
目的 :比较经尿道电切前列腺术 (TURP) ,经尿道前列腺气化切除术 (TUVP)及经尿道接触式激光前列腺切除术 (TULP)的治疗效果。方法 :在 30 0 0例前列腺增生症患者中 ,按三种术式各随机抽取 2 0例术前条件具有可比性的患者 ,进行疗效比较。结果 :3种术式患者手术前后前列腺症状评分 (IPSS)、生活质量评分(QOL)、最大尿流率 (MFR)、剩余尿 (PVR)比较均得到显著改善 (P <0 .0 1) ,3组之间相比差异无显著性意义(P >0 .0 5 )。手术时间 :TUVP及TURP组明显短于TULP组 (P <0 .0 1) ,术中失血量及术后置管时间 :TUVP及TULP组明显少于TURP组 (P <0 .0 1)。TURP组术后继发感染、出血、暂时性尿失禁发生率少于TUVP及TULP组。结论 :3种术式治疗效果相同 ;TUVP操作简单、安全 ,对初学者来说尤其适宜 ;TURP仍为治疗BPH的金标准术式  相似文献   
15.
Objective Postoperative pericardial effusion commonly occurs after open heart surgery. However, after general thoracotomy such as pulmonary resection, there have been few reports of pericardial effusion. The purpose of this study is to investigate patients with pericardial effusion following pulmonary resection.Methods: Among 2,385 patients with pulmonary resection for lung neoplasm in our institute, eight patients, whose pericardium had never been opened during the operation, developed pericardial effusion. The clinical characteristics of the eight patients were analyzed.Results: Pericardial effusion after pulmonary resection was divided into two subtypes: pericardial effusion in three patients with left thoracotomy occurring within 30 days postoperatively, and pericardial effusion in the remaining five patients with right thoracotomy occurring more than 30 days postoperatively. Pericardiotomy or pericardiocentesis was performed in three symptomatic patients, and the remaining five asymptomatic patients were treated with diuretics. Pericardial effusion disappeared in three of the five patients about 1–3 months after the conservative treatment, while, in the remaining patients, because pericardial effusion had increased gradually, pericardiocentesis was performed.Conclusion: From our experience, the treatment strategy of drainage for early pericardial effusion and diuretics for late pericardial effusion seems to be appropriate. (Jpn J Thorac Cardiovasc Surg 2006; 54:193-198)  相似文献   
16.
Endoscopic submucosal dissection (ESD) for colorectal cancer is not widely accepted because of its technical difficulty and the risk of perforation. In addition, the risk of peritonitis cannot be completely eliminated even if a perforation is closed successfully. Reported here are two cases of early colon cancer in which the patients sustained iatrogenic perforations of the ascending colon during conventional endoscopic mucosal resection and of the sigmoid colon during ESD, respectively, requiring abdominal decompression with an 18 G Medicut needle. Both of these perforations were successfully treated by endoscopic clipping. In conclusion, conservative medical management may be possible in patients who have undergone successful closure of colonic perforations using endoscopic clipping. In order to perform immediate endoscopic closure, abdominal decompression has been useful to decrease patient discomfort and colonic lumen collapse. Now, CO2 insufflation is being used effectively for the prevention of pneumoperitoneum.  相似文献   
17.
输尿管口囊肿的微创手术治疗   总被引:12,自引:0,他引:12  
目的评价输尿管口囊肿的微创手术治疗方法及其疗效。方法回顾性分析25例行经尿道电切(TURU)手术治疗输尿管口囊肿患者资料。男9例,女16例;年龄18—61岁,平均38岁;单侧18例,双侧7例;单纯输尿管囊肿22例,异位输尿管囊肿3例。结果25例患者手术一次成功22例,手术平均时间15min,术后平均住院3d。术后定期B超、膀胱造影随诊,随诊时间1—9年,3例异位输尿管囊肿合并重复肾、输尿管畸形患者存在术后膀胱输尿管返流,2例再次行开放手术后痊愈。结论TURU是治疗成人输尿管口囊肿的有效方法;当合并存在重复肾输尿管畸形或术后膀胱输尿管返流时,应采用输尿管膀胱抗返流手术。  相似文献   
18.
Background: Endoscopic mucosal resection (EMR) is widely accepted as a minimally invasive treatment for early gastric cancer (EGC) in Japan. However, the criteria for EMR must be strictly adhered to otherwise patients will miss the chance for additional therapy. We assess the important factor in expanding the indication of EMR. Methods: We investigated 1101 EGCs that had been resected by EMR at the National Cancer Center Hospital (NCCH), Tokyo, Japan, according to the indication recommended by Japanese Gastric Cancer Association (JGCA) and the expanded indication proposed by NCCH. Curability and local recurrence of the EMRs were assessed related to the applied indication and the number of resected specimens. Results: The recurrence rate of non‐evaluable resection was higher than that of evaluable resection (P < 0.0001). Eighty‐three lesions among 772 lesions in the JGCA group were non‐evaluable. Thirty‐seven leisons among 329 lesions in the NCCH group were non‐evaluable. There was no difference in the rate of non‐evaluable resection between JGCA and NCCH groups (P = 0.8329). However, the rate of curative resection was lower in the NCCH group than in the JGCA group (P = 0.0009). In piecemeal resection, there was no difference in the rate of non‐evaluable resection between JGCA and NCCH groups (P = 0.0527). In one‐piece resection, the rate of non‐evaluable resection was lower in the NCCH group than the JGCA group (P = 0.0137). Conclusion: Based on our series of cases, we propose one‐piece resection as a gold standard for EMR because it enables accurate histological evaluation, even in the EMR, according to the expanded indication.  相似文献   
19.
目的 分析经尿道前列腺电切术(TURP)与经尿道前列腺汽化电切术(TVP)术中、术后常见并发症的原因、预防及治疗,提高手术安全性和有效性。方法 回顾性分析1999年5月-2006年6月我院TURP和TVP术48例并发症患者的临床资料。结果 平均手术时间75min,平均切除组织41g。术中、术后出血20例,电切综合征(TURS)5例,暂时性尿失禁11例,膀胱颈部挛缩5例,尿道狭窄8例,尿路感染7例,膀胱穿孔1例。结论 TURP和TVP是良性前列腺增生症安全有效的外科治疗方法,术前详细采集病史,术中正确操作。术后对病人正确指导及处理可有效减少手术并发症。  相似文献   
20.
Carcinoma of the urinary bladder presenting during pregnancy is rare. We report two such cases presenting with gross hematuria, both of which were managed by transurethral electroresection of the tumor; there was no adverse effect on the pregnancies. Transurethral resection thus appears to be the procedure of choice in the management of this condition, and carries minimal morbidity even when performed during pregnancy. EDITORIAL COMMENT: As these authors point out, bladder tumors are rare in pregnancy and frequently present as gross hematuria that is mistaken for vaginal bleeding due to the pregnancy. Ultrasound is very helpful in distinguishing the causes of bleeding, and will show the bladder filled with clots and frequently the tumor as well. Standard transurethral resection is effective when performed during pregnancy, bearing in mind the need to heed to the anesthetic risks inherent in any operative procedure during pregnancy.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号