全文获取类型
收费全文 | 437817篇 |
免费 | 55991篇 |
国内免费 | 21733篇 |
专业分类
耳鼻咽喉 | 7761篇 |
儿科学 | 8345篇 |
妇产科学 | 6052篇 |
基础医学 | 38144篇 |
口腔科学 | 6373篇 |
临床医学 | 64423篇 |
内科学 | 89260篇 |
皮肤病学 | 10795篇 |
神经病学 | 30168篇 |
特种医学 | 17997篇 |
外国民族医学 | 153篇 |
外科学 | 68636篇 |
综合类 | 46572篇 |
现状与发展 | 146篇 |
一般理论 | 25篇 |
预防医学 | 24902篇 |
眼科学 | 12077篇 |
药学 | 31407篇 |
252篇 | |
中国医学 | 15947篇 |
肿瘤学 | 36106篇 |
出版年
2024年 | 1502篇 |
2023年 | 8789篇 |
2022年 | 12393篇 |
2021年 | 17388篇 |
2020年 | 16374篇 |
2019年 | 11426篇 |
2018年 | 17170篇 |
2017年 | 16143篇 |
2016年 | 16813篇 |
2015年 | 21532篇 |
2014年 | 31591篇 |
2013年 | 29943篇 |
2012年 | 27251篇 |
2011年 | 29523篇 |
2010年 | 24816篇 |
2009年 | 25757篇 |
2008年 | 21288篇 |
2007年 | 19268篇 |
2006年 | 21656篇 |
2005年 | 18519篇 |
2004年 | 12662篇 |
2003年 | 11262篇 |
2002年 | 9820篇 |
2001年 | 10276篇 |
2000年 | 9611篇 |
1999年 | 9988篇 |
1998年 | 7862篇 |
1997年 | 7564篇 |
1996年 | 6684篇 |
1995年 | 6263篇 |
1994年 | 4540篇 |
1993年 | 3232篇 |
1992年 | 3590篇 |
1991年 | 3312篇 |
1990年 | 2599篇 |
1989年 | 2489篇 |
1988年 | 2180篇 |
1987年 | 1900篇 |
1986年 | 1735篇 |
1985年 | 1322篇 |
1984年 | 925篇 |
1983年 | 796篇 |
1982年 | 694篇 |
1981年 | 568篇 |
1980年 | 492篇 |
1979年 | 462篇 |
1978年 | 382篇 |
1977年 | 451篇 |
1975年 | 341篇 |
1972年 | 354篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
目的了解我院门诊就诊者对子宫颈病变相关知识的认识。方法自制问卷调查表,采用无记名,当面问卷调查方式。结果从调查100例就诊者中,未做过健康体检、妇科盆腔检查和宫颈刮片检查分别为34例、24例和52例。对宫颈癌的认识不知道者53例。结论建议相关部门加强对妇女的健康教育,提高其健康意识,强化临床医生的防癌意识和对子宫病变的规范化诊治。 相似文献
102.
胰腺假性囊肿的诊治体会 总被引:11,自引:0,他引:11
目的 总结胰腺假性囊肿的诊治体会。方法 回顾性分析46例胰腺假性囊肿患者的临床资料,7例保守治疗,行内引流术12例,外引流术9例,序贯式内外引流术5例,胰腺部分切除术13例。结果 保守治疗者均痊愈,无复发;行内引流术者中有1例发生肠瘘,其余11例恢复良好无复发;行外引流术1例出现胰瘘,2例复发;行胰腺部分切除术者有1例出现胰瘘,其余恢复良好。结论 根据病情和病程选择合适的术式是治疗胰腺假性囊肿的关键。 相似文献
103.
104.
105.
106.
Jin Sik Burm 《Journal of plastic, reconstructive & aesthetic surgery》2006,59(3):253-256
This paper describes the use of a composite graft from the mastoid area consisting of full-thickness skin peripherally and selectively localised fascia-fat tissue underneath the skin centrally for immediate reconstruction of moderate defects of the nasal tip including the columella and soft triangle. Mastoid composite grafting is a simple and safe procedure that avoids partial graft loss and provides adequate augmentation of soft tissue, easy reshaping of the new nostril rim, minimal post-operative shrinkage, and no donor-site morbidity. Then, it results in a satisfactory nasal appearance with adequate tip projection and symmetry. This procedure may represent a preferred method of nasal tip reconstruction. 相似文献
107.
Toshio Imaizumi MD PhD Toshimi Honma MD PhD Yoshifumi Horita MD Ikuhide Kohama MD PhD Kei Miyata MD Maiko Kawamura MD Jun Niwa MD PhD 《Journal of neuroimaging》2006,16(3):236-242
BACKGROUND AND PURPOSE: Dot-like low intensity spots (dot-like hemosiderin spots: dotHSs) on gradient echo T2*-weighted MRI have been histologically diagnosed to represent old cerebral microbleeds associated with microangiopathies. They have also been correlated to the fragility of small vessels and the tendency to bleed. Therefore, a substantial number of dotHSs might be associated with a large-sized, deep intracerebral hematoma (ICH). On the other hand, dotHSs may reflect old microbleeds that did not enlarge to symptomatic size. METHODS: To investigate how dotHSs are related to the size (maximal diameter) of primary deep ICH, we analyzed the diameter and the number of dotHSs in 151 patients with deep ICH not associated with subarachnoid hemorrhage or intraventricular hemorrhage (75 males and 76 females, age ranged from 37 to 90 [65.7 +/- 11.3 years old] who were consecutively admitted to Hakodate Municipal Hospital. The hazard ratio (HR) for a maximal diameter of deep ICH < or =2 cm was estimated, using the number of dotHSs and risk factors for stroke. RESULTS: The number of dotHSs associated with the diameter < or =2 cm was 9.2 +/- 11.5, significantly larger than that with the diameter > or =2 cm (4.7 +/- 7.0, P= .012). Multivariate analysis revealed that a maximal diameter of deep ICH of < or =2 cm was found in patients with dotHS (HR, 3.7; 95% confidence interval [CI], 1.4-10.1; P= .009). CONCLUSION: Though small sample size limited the power of our analyses, these findings suggest that the number of dotHSs may be associated with a small diameter of deep ICH. 相似文献
108.
A Trakic F Liu H Sanchez Lopez H Wang S Crozier 《Magnetic resonance in medicine》2007,57(6):1119-1130
The switching of magnetic field gradient coils in magnetic resonance imaging (MRI) inevitably induces transient eddy currents in conducting system components, such as the cryostat vessel. These secondary currents degrade the spatial and temporal performance of the gradient coils, and compensation methods are commonly employed to correct for these distortions. This theoretical study shows that by incorporating the eddy currents into the coil optimization process, it is possible to modify a gradient coil design so that the fields created by the coil and the eddy currents combine together to generate a spatially homogeneous gradient that follows the input pulse. Shielded and unshielded longitudinal gradient coils are used to exemplify this novel approach. To assist in the evaluation of transient eddy currents induced within a realistic cryostat vessel, a low-frequency finite-difference time-domain (FDTD) method using the total-field scattered-field (TFSF) scheme was performed. The simulations demonstrate the effectiveness of the proposed method for optimizing longitudinal gradient fields while taking into account the spatial and temporal behavior of the eddy currents. 相似文献
109.
110.
在给病人使用化疗药物的过程中,护士不可避免地接触抗肿瘤药物,因而对自身健康产生危害。为了维护护士的健康,提高护理人员的防护意识,我们对肿瘤专科护士做一个防护调查,现将情况介绍如下。1临床资料与方法1.1临床资料选取山西省肿瘤医院临床一线,参加工作2年以上并经常接触化 相似文献