全文获取类型
收费全文 | 5316篇 |
免费 | 284篇 |
国内免费 | 78篇 |
专业分类
耳鼻咽喉 | 96篇 |
儿科学 | 52篇 |
妇产科学 | 51篇 |
基础医学 | 906篇 |
口腔科学 | 136篇 |
临床医学 | 524篇 |
内科学 | 1034篇 |
皮肤病学 | 114篇 |
神经病学 | 459篇 |
特种医学 | 353篇 |
外科学 | 741篇 |
综合类 | 25篇 |
预防医学 | 207篇 |
眼科学 | 53篇 |
药学 | 457篇 |
1篇 | |
中国医学 | 76篇 |
肿瘤学 | 393篇 |
出版年
2023年 | 44篇 |
2022年 | 168篇 |
2021年 | 242篇 |
2020年 | 109篇 |
2019年 | 122篇 |
2018年 | 152篇 |
2017年 | 124篇 |
2016年 | 197篇 |
2015年 | 352篇 |
2014年 | 358篇 |
2013年 | 395篇 |
2012年 | 571篇 |
2011年 | 541篇 |
2010年 | 279篇 |
2009年 | 244篇 |
2008年 | 328篇 |
2007年 | 286篇 |
2006年 | 233篇 |
2005年 | 161篇 |
2004年 | 111篇 |
2003年 | 96篇 |
2002年 | 84篇 |
2001年 | 82篇 |
2000年 | 67篇 |
1999年 | 47篇 |
1998年 | 44篇 |
1997年 | 25篇 |
1996年 | 36篇 |
1995年 | 22篇 |
1994年 | 25篇 |
1993年 | 20篇 |
1992年 | 15篇 |
1991年 | 4篇 |
1990年 | 6篇 |
1989年 | 5篇 |
1988年 | 15篇 |
1987年 | 7篇 |
1986年 | 8篇 |
1985年 | 10篇 |
1984年 | 5篇 |
1983年 | 8篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1977年 | 8篇 |
1976年 | 4篇 |
1975年 | 3篇 |
1963年 | 1篇 |
1961年 | 1篇 |
排序方式: 共有5678条查询结果,搜索用时 15 毫秒
1.
2.
Su Jeong Seong Jin Pyo Hong Bong-Jin Hahm Hong Jin Jeon Jee Hoon Sohn Jun Young Lee Maeng Je Cho 《Journal of Korean medical science》2015,30(11):1675-1681
While decreasing trend in gender differences in alcohol use disorders was reported in Western countries, the change in Asian countries is unknown. This study aims to explore the shifts in gender difference in alcohol abuse (AA) and dependence (AD) in Korea. We compared the data from two nation-wide community surveys to evaluate gender differences in lifetime AA and AD by Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV). Face-to-face interviews using the Composite International Diagnostic Interview (CIDI) were applied to all subjects in 2001 (n=6,220) and 2011 (n=6,022). Male-to-female ratio of odds was decreased from 6.41 (95% CI, 4.81-8.54) to 4.37 (95% CI, 3.35-5.71) for AA and from 3.75 (95% CI, 2.96-4.75) to 2.40 (95% CI, 1.80-3.19) for AD. Among those aged 18-29, gender gap even became statistically insignificant for AA (OR, 1.59; 95% CI, 0.97-2.63) and AD (OR, 1.18; 95% CI, 0.80-2.41) in 2011. Men generally showed decreased odds for AD (0.55; 95% CI, 0.45-0.67) and women aged 30-39 showed increased odds for AA (2.13; 95% CI 1.18-3.84) in 2011 compared to 2001. Decreased AD in men and increased AA in women seem to contribute to the decrease of gender gap. Increased risk for AA in young women suggests needs for interventions. 相似文献
3.
4.
Jai Hoon Yoon Yoon Kyung Park Byong Kwan Sohn Yong Chul Jeon Joo Hyun Sohn Dong Soo Han 《Taehan Sohwagi Hakhoe chi》2007,49(1):41-44
Torsion of greater omentum is a rare cause of acute abdomen. However, it should be included in the differential diagnoses in addition to acute cholecystitis, acute appendicitis, cecal diverticulitis, and other variable causes of acute abdomen. Diagnosis is usually made at laparotomy for suspected appendicitis. In some cases, computed tomography demonstrates a successful preoperative detection of omental torsion. We report a case of surgically and pathologically proven torsion with subsequent infarction of greater omentum presented as an acute abdominal pain. 相似文献
5.
Golli M; Van Nhieu JT; Mathieu D; Zafrani ES; Cherqui D; Dhumeaux D; Vasile N; Rahmouni A 《Radiology》1994,190(3):741
6.
7.
H J Jeon T Akagi Y Hoshida K Hayashi T Yoshino T Tanaka J Ito T Kamei K Kawabata 《Cancer》1992,70(10):2451-2459
BACKGROUND. The breast is rarely a primary site for extranodal malignant lymphoma. Most reported primary non-Hodgkin malignant lymphomas of the breast (PBL) are of B-cell phenotype. METHODS. Histologic and immunohistochemical analyses of seven patients with PBL and a statistical analysis of 152 patients with PBL reported in the Japanese literature were performed. RESULTS. Malignant lymphoma could not be predicted preoperatively with clinical and radiologic findings; breast carcinoma, fibroadenoma, and phyllodes tumor were the preoperative diagnoses. All patients were women; they ranged in age from 31 to 80 years (mean, 57.6 years). The right breast was involved initially in five patients. In four, only the breast was involved (Stage I), whereas in three, the ipsilateral axillary lymph nodes (Stage II) were involved at diagnosis. According to the Working Formulation, all patients belonged to the intermediate grade and were classified as having diffuse large cell (five patients) or mixed (two patients) lymphoma. Immunophenotypic analysis revealed that all patients had B-cell lymphoma. No patients had lymphoepithelial lesions, which is the characteristic feature in categorizing a lymphoma as a mucosa-associated lymphoid tissue (MALT) lymphoma. A statistical analysis of the patient reported in the Japanese literature has divided PBL into two types: a bilateral type that affects younger women and a unilateral type that has a broad age distribution, but preponderantly occurs in older women. The age and stage at diagnosis were significant prognostic factors in predicting the survival time, but the location and size of the tumor at initial presentation, histopathologic type, terminal leukemic manifestation, and treatment modality were not. CONCLUSIONS. This study indicates that most PBL are diffuse large cell lymphoma of B-cell phenotype and that the age and stage at diagnosis are significant prognostic factors. 相似文献
8.
Dopamine transporter density is decreased in parkinsonian patients with a history of manganese exposure: What does it mean? 总被引:2,自引:0,他引:2
Y Kim J-M Kim J-W Kim C-I Yoo C R Lee J H Lee H K Kim S O Yang H K Chung D S Lee B Jeon 《Movement disorders》2002,17(3):568-575
Manganese (Mn) exposure can cause parkinsonism. Pathological changes occur mostly in the pallidum and striatum. Two patients with a long history of occupational Mn exposure presented with Mn-induced parkinsonism. In one patient, magnetic resonance imaging (MRI) showed findings consistent with Mn exposure, and Mn concentration was increased in the blood and urine. However, this patient's clinical features were typical of idiopathic Parkinson disease (PD). Previous pathological and positron emission tomography studies indicate that striatal dopamine transporter density is normal in Mn-induced parkinsonism, whereas it is decreased in PD. Therefore, we performed [(123)I]-(1r)-2 beta-carboxymethoxy-3beta-(4-iodophenyl)tropane ([(123)I]-beta-CIT) single-photon emission computed tomography. Severe reduction of striatal beta-CIT binding was indicated, which is consistent with PD. We propose three interpretations: (1) the patients have PD, and Mn exposure is incidental; (2) Mn induces selective degeneration of presynaptic dopaminergic nerve terminals, thereby causing parkinsonism; or (3) Mn exposure acts as a risk of PD in these patients. Our results and careful review of previous studies indicate that the axiom that Mn causes parkinsonism by pallidal lesion may be over-simplified; Mn exposure and parkinsonism may be more complex than previously thought. Further studies are required to elucidate the relationship between Mn and various forms of parkinsonism. 相似文献
9.
10.