全文获取类型
收费全文 | 22171篇 |
免费 | 985篇 |
国内免费 | 553篇 |
专业分类
耳鼻咽喉 | 107篇 |
儿科学 | 446篇 |
妇产科学 | 843篇 |
基础医学 | 569篇 |
口腔科学 | 30篇 |
临床医学 | 3073篇 |
内科学 | 1925篇 |
皮肤病学 | 51篇 |
神经病学 | 4082篇 |
特种医学 | 960篇 |
外国民族医学 | 1篇 |
外科学 | 1426篇 |
综合类 | 5327篇 |
现状与发展 | 1篇 |
预防医学 | 1053篇 |
眼科学 | 511篇 |
药学 | 2244篇 |
46篇 | |
中国医学 | 907篇 |
肿瘤学 | 107篇 |
出版年
2024年 | 39篇 |
2023年 | 230篇 |
2022年 | 562篇 |
2021年 | 745篇 |
2020年 | 675篇 |
2019年 | 576篇 |
2018年 | 548篇 |
2017年 | 660篇 |
2016年 | 790篇 |
2015年 | 831篇 |
2014年 | 1690篇 |
2013年 | 1524篇 |
2012年 | 1562篇 |
2011年 | 1621篇 |
2010年 | 1439篇 |
2009年 | 1289篇 |
2008年 | 1118篇 |
2007年 | 1148篇 |
2006年 | 1104篇 |
2005年 | 978篇 |
2004年 | 766篇 |
2003年 | 616篇 |
2002年 | 497篇 |
2001年 | 438篇 |
2000年 | 337篇 |
1999年 | 293篇 |
1998年 | 191篇 |
1997年 | 194篇 |
1996年 | 105篇 |
1995年 | 139篇 |
1994年 | 121篇 |
1993年 | 109篇 |
1992年 | 92篇 |
1991年 | 79篇 |
1990年 | 59篇 |
1989年 | 54篇 |
1988年 | 57篇 |
1987年 | 51篇 |
1986年 | 58篇 |
1985年 | 69篇 |
1984年 | 50篇 |
1983年 | 36篇 |
1982年 | 38篇 |
1981年 | 49篇 |
1980年 | 23篇 |
1979年 | 11篇 |
1978年 | 19篇 |
1977年 | 9篇 |
1976年 | 9篇 |
1975年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
微创穿刺术治疗基底节区脑出血临床随机对照研究 总被引:50,自引:3,他引:47
目的评价比较微创穿刺血肿粉碎清除术与内科保守治疗两种方法治疗基底节区脑出血(25~40m l)的疗效异同。方法采用多中心、随机对照试验的方法,42个参研医院共随机入选465例基底节区脑出血患者,根据纳入与排除标准共排除88例,其中资料不全者16例;不符合入选标准者72例,分别为Glasgow评分≤8分(64例)、术前出血量>40m l(7例)、从发病到达急诊室时间>72h(1例)。评价治疗14d时两组患者神经功能缺损程度和日常生活活动能力、治疗3个月时的日常生活活动能力以及3个月和住院期间病死率。结果最终符合入组标准的病例数为377例,其中微创治疗组195例,对照组182例。微创治疗组患者于治疗14d时,神经功能改善明显优于对照组(χ2=7.931,P=0.02);治疗3个月时达良好功能状态的患者比例明显多于对照组(35.91%vs21.82%;χ2=8.294P=0.004)。微创治疗组病,残率明显低于对照组(40.88%vs63.03%,χ2=16.948,P<0.01);两组病死率间差异无显著性意义(6.67%vs8.79%)。结论与单纯内科保守治疗相比,应用微创穿刺血肿粉碎清除术治疗基底节区小血肿不增加病死率,并可明显提高脑出血患者的日常生活活动能力,降低病残率。 相似文献
22.
中风后癫痫的临床研究 总被引:5,自引:0,他引:5
本文报告36例中风后癫痫发作的临床和CT资料。通过回顾性病历复习和随访发现,中风后癫痫的发生率占同期住院中风患者的5.26%,以蛛网膜下腔出血和脑栓塞发生癫痫比率最高,分别为15%和12.5%。癫痫发作与CT所见病灶分布密切相关,皮质病灶较皮质下病灶更易发生病病。癫痫发作可发生于中风后任何时期,但早期癫痫以出血性中风多见,而迟发性癫痫则更多见于脑梗塞患者。 相似文献
23.
M. Strittmatter G. Hamann U. Sahin W. Feiden K. Kohl K. Schimrigk 《European journal of neurology》1996,3(2):149-152
We report a first case of a 19 year old female suffering from an acute lymphatic leukemia, which developed shortly after the initiation of a chemotherapy an intracerebral hemorrhage and fatal multiple brain abscesses caused by Bacillus cereus. There is much evidence that Bacillus cereus in immunocompromised patients leads to a localized, necrotizing tissue infection due to the production of potent toxins and usually results in rapid and fulminant tissue destruction. Bacillus species has an special affinity for the CNS mediated by phospholipase C, which tends to associate with the lipid membranes of the brain. 相似文献
24.
目的 探讨普萘洛尔和低剂量兰索拉唑长期维持治疗对预防肝硬化门脉高压消化道出血的疗效。方法 1 1 9例肝硬化门脉高压患者随机分为 3组 :Ⅰ组 :给予口服普萘洛尔加上护肝治疗。Ⅱ组 :联合给予低剂量兰索拉唑和普萘洛尔。Ⅲ组 :仅给予护肝治疗。兰索拉唑维持服药 6个月 ,普萘洛尔及一般对症治疗维持 1年。观察治疗前后各组患者所伴发溃疡、门脉高压性胃病 (PHG)、急性胃黏膜病变 (AGML)情况 (发生率 ) ,各组消化道出血的复发率、门静脉直径 (PVD)、脾静脉直径 (SVD)的变化。结果 经 1年观察 ,结果显示 ,普萘洛尔组、联合治疗组、对照组出血的复发率分别为 1 5 0 %、2 2 %、48 5 % ,组Ⅰ、组Ⅱ复发率显著低于组Ⅲ ,同时 ,组Ⅰ与组Ⅱ间的差异有显著性意义。治疗可见组Ⅰ、组Ⅱ患者所伴发的溃疡、PHG、AGML明显改善 ,PVD、SVD缩小。结论 普萘洛尔组联合抑制酸维持治疗 ,可预防引起消化道出血多种病因 ,较单用普萘洛尔的疗效好 相似文献
25.
我科于1999年10月以来,对各种原因引起的脑出血(出血量≥30 ml)的患者采用贾保祥[1]教授研制的微创颅内血肿清除术进行治疗,取得了良好效果。现报告如下。1临床资料1.1一般资料本组65例,男38例,女27例,发病年龄32岁-83岁,平均年龄56.2岁。其中高血压引起的脑出血63例,急性硬膜下血肿2例,超早期(发病7 h内)就诊28例,早期(发病7 h~3 d)就诊35例,延期(发病3 d以上)2例。1.2临床表现大部分患者发病早期均有头痛或头晕,其中呕吐52例,有高血压史者59例,有头部外伤史2例。神志清醒者17例,昏迷48例,其中深昏迷18例,中度昏迷21例,浅昏迷9例。61例偏瘫… 相似文献
26.
Ghaus M. Malik Balaji Sadasivan Robert S. Knighton James I. Ausman 《Child's nervous system》1991,7(1):43-47
Between January 1941 and June 1989, 46 children below the age of 18 with an arteriovenous malformation (AVM) were managed. There were 7 patients with AVM diagnosed before the age of 2; 10 patients were diagnosed between the ages of 3 and 10; and 29 patients were diagnosed between 11 and 18. There were equal numbers of male and female patients. Twenty-five of the AVMs were large (>5 cm longest diameter). All 7 AVMs diagnosed before the age of 2 were large. The usual clinical presentation was congestive heart failure, bruit and an enlarging head. Three patients underwent excision with 2 deaths and 1 excellent result. In 11 patients (aged 3–18) with AVM without history of hemorrhage, 3 had excision with 2 excellent and 1 fair result. Four remained stable. Four developed progressive deficits or hemorrhage. In 10 patients (aged 3–18) with AVM and hemorrhage who were treated medically, 7 (70%) had an episode of re-hemorrhage. Three patients had excision of AVM after re-hemorrhage, but before the age of 18 with an excellent result. Eighteen patients (aged 3–18) with AVM and a single episode of hemorrhage underwent excision with 17 excellent or good results and 1 fair result. The overall mortality was 7%. Eighty-five percent of the children with excision of AVM had an excellent or good result. The best treatment for AVM in children is surgical excision.Presented at the XVII Annual Meeting of the International Society for Pediatric Neurosurgery, Bombay 1989 相似文献
27.
Stephen D Silberstein James J Corbett 《Cephalalgia : an international journal of headache》1993,13(3):212-213
Lumbar puncture is crucial in two distinct clinical situations in the diagnosis of the headache patient. The first is the patient who is suspected of having a symptomatic headache; the second is the patient with a chronic intractable or atypical headache disorder. This review discusses the usefulness of the lumbar puncture in the diagnosis of headache secondary to subarachnoid hemorrhage, meningitis, and intracranial hypotension and hypertension. The value of lumbar puncture in the presence of a normal CT/MRI scan is discussed. 相似文献
28.
29.
"Hour-glass" shape of the uterus in the diagnosis and treatment of cervical pregnancy 总被引:2,自引:0,他引:2
Papaloucas CD 《Clinical anatomy (New York, N.Y.)》2004,17(8):658-661
This study attempts to point out the importance of the anatomo-clinical finding of an "hour-glass" shape to the uterus in the diagnosis and treatment of cervical pregnancy. From 1973 to 2001, four cases of cervical pregnancy were treated in the 2nd Obstetrical and Gynecological Clinic of the Aristotelion University of Salonica. The incidence was 1:13,111 pregnancies (4 cervical in 52,446 pregnancies). Three of the patients underwent bilateral ligation of the anterior trunk of the internal iliac artery using absorbable ligatures. The fourth patient (a 42-year-old), elected to have a hysterectomy. All patients were well and discharged from hospital on the seventh postoperative day. Two of the three patients treated by ligation of the anterior trunk of the internal iliac arteries subsequently had normal pregnancies and deliveries. We lost contact with the third patient. The finding of an "hour-glass" uterine shape was very helpful in the diagnosis of cervical pregnancy. The Aristotelion University of Salonica has found that treatment by ligation of the anterior trunk of the internal iliac arteries is effective, causes no complications, never ends in hysterectomy, and maintains the normal menstrual cycles and reproductive ability of the woman. 相似文献
30.
The results obtained in 304 consecutive patients with spontaneous subarachnoid hemorrhage are described, the majority of whom (86%) were admitted while in acute condition. Only 46% of the patients in this series were in good condition at admission. The initial management was standardized for all patients, but the protocol of "delayed surgery" was applied to patients with subarachnoid hemorrhage from aneurysmal rupture. Two hundred and twenty-two patients (73%) had intracranial aneurysms. Of these, 20 (9%) were moribund and died shortly after admission; nine (4%) underwent emergency surgery due to the coexistence of a life-threatening cerebral hematoma; seven (3%) were operated upon within 3 days of admission; 78 (35%) died after rebleeding or after steady deterioration of the patient's condition due to vasospasm while awaiting surgery. Of the remaining 108 patients ready for delayed surgery, 12 (11%) (operation refused, elderly patients in poor general condition, spontaneous thrombosis of the aneurysm) were treated conservatively, and 96 (89%), who were in various clinical conditions, were actually operated on. Of these 96 patients, 79 (82%) exhibited excellent or good results, 5 (5%) were disabled, and 12 (12%) died. In the authors' experience, the overall management of intracranial aneurysms in unselected patients according to the protocol of delayed surgery results in significant loss of patients awaiting surgery, and good surgical results in the survivors. 相似文献