全文获取类型
收费全文 | 22785篇 |
免费 | 1443篇 |
国内免费 | 255篇 |
专业分类
耳鼻咽喉 | 380篇 |
儿科学 | 358篇 |
妇产科学 | 487篇 |
基础医学 | 3692篇 |
口腔科学 | 503篇 |
临床医学 | 1953篇 |
内科学 | 4429篇 |
皮肤病学 | 617篇 |
神经病学 | 1713篇 |
特种医学 | 1265篇 |
外科学 | 2839篇 |
综合类 | 180篇 |
一般理论 | 4篇 |
预防医学 | 1100篇 |
眼科学 | 710篇 |
药学 | 2149篇 |
中国医学 | 326篇 |
肿瘤学 | 1778篇 |
出版年
2023年 | 173篇 |
2022年 | 541篇 |
2021年 | 864篇 |
2020年 | 424篇 |
2019年 | 630篇 |
2018年 | 748篇 |
2017年 | 592篇 |
2016年 | 827篇 |
2015年 | 1155篇 |
2014年 | 1286篇 |
2013年 | 1558篇 |
2012年 | 2194篇 |
2011年 | 2090篇 |
2010年 | 1239篇 |
2009年 | 968篇 |
2008年 | 1323篇 |
2007年 | 1220篇 |
2006年 | 1114篇 |
2005年 | 1003篇 |
2004年 | 816篇 |
2003年 | 677篇 |
2002年 | 614篇 |
2001年 | 409篇 |
2000年 | 356篇 |
1999年 | 267篇 |
1998年 | 114篇 |
1997年 | 72篇 |
1996年 | 61篇 |
1995年 | 67篇 |
1994年 | 53篇 |
1993年 | 50篇 |
1992年 | 125篇 |
1991年 | 108篇 |
1990年 | 96篇 |
1989年 | 97篇 |
1988年 | 82篇 |
1987年 | 70篇 |
1986年 | 58篇 |
1985年 | 56篇 |
1984年 | 34篇 |
1983年 | 31篇 |
1982年 | 21篇 |
1981年 | 12篇 |
1980年 | 16篇 |
1979年 | 16篇 |
1978年 | 20篇 |
1977年 | 14篇 |
1975年 | 15篇 |
1974年 | 25篇 |
1973年 | 11篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
Hwang TL Alpert JN Cooley DA Hall RJ 《Texas Heart Institute journal / from the Texas Heart Institute of St. Luke's Episcopal Hospital, Texas Children's Hospital》1983,10(3):249-255
A 20-year-old white woman with Takayasu's arteritis had headaches, neck soreness, and a right carotid bruit. Corticosteroid treatment only temporarily relieved symptoms and caused Cushing's syndrome because of high dosage requirements. Progressive narrowing of the right common carotid artery occurred despite treatment. The diseased portion of the artery was successfully resected and replaced by a Dacron graft. Corticosteroid treatment was then tapered and discontinued, and the patient has remained well for 3 years. Carotid Doppler and real-time ultrasound studies performed more than 2 years after surgery showed a patent graft and no new disease process. This technique may be of value in selected cases for both prevention of cerebral ischemia and the elimination of local symptoms of the inflammatory process. 相似文献
62.
Histoclinical Analysis of Early Colorectal Cancer 总被引:5,自引:0,他引:5
To evaluate the clinicopathologic characteristics of early colorectal cancer (ECC), histopathologic and clinical features
of 90 ECC patients who underwent surgical resection (not including the endoscopic polypectomized cases) and 1704 patients
with advanced colorectal cancer were analyzed. Smaller size, better histologic differentiation, less lymph node (LN) metastasis,
and better clinical outcome were observed in those with ECC than in patients with more advanced lesions. LN metastasis was
found in 5 patients with ECC among the 56 patients who underwent bowel resection (8.9%). Tumors with LN metastasis were more
frequently associated with deep submucosal invasion, absence of an adenomatous component within the tumor, sessile configuration,
and lymphovascular invasion. Tumors showing deep submucosal layer invasion were associated with a more unfavorable histologic
grade, lymphovascular invasion, LN metastasis, sessile morphology, and absence of an adenomatous component within the tumor.
Recurrence was observed in two patients who underwent local excision for their submucosal cancer. One of the patients was
salvaged after bowel resection, but one patient died of distant metastasis. From our data analysis and literature review,
extensive submucosal invasion, lymphovascular invasion, sessile configuration, and tumors with no adenomatous component should
be considered high risk factors for LN metastasis and recurrence after limited therapy. 相似文献
63.
We used magnetic resonance imaging (MRI) to evaluate bowleg deformities in infancy. Twenty-five tibiae of 13 infants were examined and divided into two groups based on MRI findings: group A had high intensity area in the medial epiphyseal cartilage on T2-weighted images. Group B had depression of medial physis and abnormal signal in the perichondrial region in addition to the epiphyseal lesion. At the final follow-up, all cases in group A demonstrated normal lower leg alignments, whereas five cases in group B showed characteristic roentogenographic findings of Blount's disease. The improvement rate of metaphyseal-diaphyseal angle was correlated with this classification. These findings suggested that abnormal findings in physis and perichondrial region might be preliminary findings in early stage of Blount's disease. The high intensity areas in the medial epiphyseal cartilage were commonly found among the cases with bowing deformities, which suggested that there might be a common pathomechanism between physiologic bowing and infantile Blount's disease. 相似文献
64.
65.
Young Ho Yun Chang Geol Lee Si-young Kim Sang-wook Lee Dae Seog Heo Jun Suk Kim Keun Seok Lee Young Seon Hong Jung Suk Lee Chang Hoon You 《Journal of clinical oncology》2004,22(2):307-314
PURPOSE:To ascertain the attitude of cancer patients and their families toward disclosure of terminal illness to the patient. PATIENTS AND METHODS: We constructed a questionnaire that included demographic and clinical information and delivered it to 758 consecutive individuals (433 cancer patients and 325 families that have a relative with cancer) at seven university hospitals and one national cancer center in Korea. RESULTS: 380 cancer patients and one member from each of 281 families that have a relative with cancer completed the questionnaire. Cancer patients were more likely than family members to believe that patients should be informed of the terminal illness (96.1% v 76.9%; P <.001). Fifty percent of the family members and 78.3% of the patients thought that the doctor in charge should be the one who informs the patient. Additionally, 71.7% of the patients and 43.6% of the family members thought that patients should be informed immediately after the diagnosis. Stepwise multiple logistic regression indicated that the patient group was more likely than the family group to want the patient to be informed of the terminal illness (odds ratio [OR], 9.76; 95% CI, 4.31 to 22.14), by the doctor (OR, 4.00; 95% CI, 2.61 to 6.11), and immediately after the diagnosis (OR, 3.64; 95% CI, 2.45 to 5.41). CONCLUSION: Our findings indicated that most cancer patients want to be informed if their illness is terminal, and physicians should realize that the patient and the family unit may differ in their attitude toward such a disclosure. Our results also reflect the importance of how information is given to the patient. 相似文献
66.
Rosai-Dorfman disease, also known as sinus histiocytosis with massive lymphadenopathy, is a rare but distinct clinicopathologic entity characterised histologically by a benign s histiocytic proliferation. Isolated involvement of extranodal sites without concomitant nodal disease is rare. We describe the pathological features of 2 cases of Rosai-Dorfman disease that were clinically confined to the skin. In both male adult Chinese patients, proliferation of histiocytes was accompanied by S-100 protein expression demonstrated immunohistochemically within the histiocytes. The pathology of Rosai-Dorfman disease and its microscopic differential diagnoses are discussed. 相似文献
67.
In a retrospective study, the prognostic value of monitoring the decay of alpha-fetoprotein (AFP) was assessed. Serum AFP was determined serially in 18 children with malignant germ-cell or hepatic tumors: 7 endodermal sinus tumor, 3 embryonal carcinoma, 5 malignant teratoma, 2 hepatoblastomas, and 1 hepatocellular carcinoma. The actual half-life (AHL) of AFP was computed after surgical resection of the tumor. In group 1, which had complete resection and no recurrence during follow-up (n = 13), the AHL of AFP was 4.0 ± 0.9 days. In group 2, which had incomplete resection or recurrence during follow-up (n = 5), the AHL of AFP was 24.8 ± 20 days, significantly longer than that of group 1 (P = 0.0026). The increased AHL of AFP indicated residual active tumor after surgical resection. The AHL of AFP may be more sensitive than serial monitoring of AFP in detecting preclinical recurrence after surgical resection of AFP-secreting tumors. Treatment strategies can be based on AFP clearance, and prospective clinical trials are warranted. 相似文献
68.
69.
Pulmonary tuberculosis in five young infants with nursery exposure: clinical, radiographic and CT findings 总被引:4,自引:0,他引:4
K.-I. Kim J. W. Lee Jae Hong Park Su Young Kim Hee Ju Park Phil Jo Choi Ki Nam Lee H. J. Kim Suk Hong Lee 《Pediatric radiology》1998,28(11):836-840
Clinical, radiographic (n = 5) and CT findings (n = 4) of five Korean infants ranging in age from 2 to 3 months with confirmed tuberculosis were retrospectively analysed.
All of the patients were symptomatic, anergic to tuberculin, and had a positive culture of Myobacterium tuberculosis in gastric aspirates. The probable source of infection was the hospital in which they were born. CT scans demonstrated hilar
and mediastinal lymph node enlargement with central low attenuation and peripheral enhancement in all cases. CT may be useful
in diagnosis by demonstrating characteristic adenopathy and disseminated disease in young infants.
Received: 2 September 1997 Accepted: 23 April 1998 相似文献
70.