全文获取类型
收费全文 | 149568篇 |
免费 | 32513篇 |
国内免费 | 2393篇 |
专业分类
耳鼻咽喉 | 5159篇 |
儿科学 | 5348篇 |
妇产科学 | 2396篇 |
基础医学 | 3216篇 |
口腔科学 | 1472篇 |
临床医学 | 26672篇 |
内科学 | 47277篇 |
皮肤病学 | 7456篇 |
神经病学 | 14769篇 |
特种医学 | 6455篇 |
外科学 | 40867篇 |
综合类 | 231篇 |
现状与发展 | 72篇 |
预防医学 | 6996篇 |
眼科学 | 3360篇 |
药学 | 977篇 |
中国医学 | 9篇 |
肿瘤学 | 11742篇 |
出版年
2024年 | 684篇 |
2023年 | 4799篇 |
2022年 | 1244篇 |
2021年 | 3121篇 |
2020年 | 6044篇 |
2019年 | 2171篇 |
2018年 | 7393篇 |
2017年 | 7337篇 |
2016年 | 8429篇 |
2015年 | 8395篇 |
2014年 | 15486篇 |
2013年 | 15609篇 |
2012年 | 5448篇 |
2011年 | 5471篇 |
2010年 | 10339篇 |
2009年 | 14242篇 |
2008年 | 5795篇 |
2007年 | 4019篇 |
2006年 | 6470篇 |
2005年 | 3746篇 |
2004年 | 3023篇 |
2003年 | 1980篇 |
2002年 | 2059篇 |
2001年 | 3778篇 |
2000年 | 2988篇 |
1999年 | 3199篇 |
1998年 | 3648篇 |
1997年 | 3464篇 |
1996年 | 3352篇 |
1995年 | 3205篇 |
1994年 | 1939篇 |
1993年 | 1563篇 |
1992年 | 1374篇 |
1991年 | 1402篇 |
1990年 | 1051篇 |
1989年 | 1174篇 |
1988年 | 1009篇 |
1987年 | 847篇 |
1986年 | 884篇 |
1985年 | 710篇 |
1984年 | 544篇 |
1983年 | 517篇 |
1982年 | 514篇 |
1981年 | 398篇 |
1980年 | 359篇 |
1979年 | 306篇 |
1978年 | 329篇 |
1977年 | 397篇 |
1975年 | 278篇 |
1972年 | 302篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
74.
75.
76.
Lingual lymph nodes are an inconstant group of in-transit nodes, which are located on the route of lymph drainage from the tongue mucosa to the regional nodes in neck levels I and II. There is growing academic data on the metastatic spread of oral cancer, particularly regarding the spreading of oral tongue squamous cell carcinoma to lingual nodes. These nodes are not currently included in diagnostic and treatment protocols for oral tongue cancer. Combined information on surgical anatomy, clinical observations, means of detection, and prognostic value is presented. Anatomically obtained incidence of lingual nodes ranges from 8.6% to 30.2%. Incidence of lingual lymph node metastasis ranges from 1.3% to 17.1%. It is clear that lymph nodes that bear intervening tissues from the floor of the mouth should be removed to improve loco-regional control. Extended resection volume, which is required for the surgical treatment of lingual node metastasis, cannot be implied to every tongue cancer patient. As these lesions significantly influence prognosis, special efforts of their detection must be made. Reasonably, every tongue cancer patient must be investigated for the existence of lingual lymph node metastasis. Lymphographic tracing methods, which are currently implied for sentinel lymph node biopsies, may improve the detection of lingual lymph nodes. 相似文献
77.
78.
79.
Status migrainosus is defined by the international classification of headache disorders (ICHD) criteria as a debilitating migraine lasting more then 72 hours. The epidemiology of status migrainosus is still unknown in adult and children, and frequently underdiagnosed. Children and adolescents often end up in the emergency room with an intractable headache that failed outpatient therapy. Six to seven percent of these children do not respond to acute infusion therapy and require hospitalization. It is imperative that more aggressive therapy is considered when patients are affected by a severe intractable headache to prevent further disability and returning the child to baseline activity. Multiple therapies are available for adults and children. Studies for acute therapy in the emergency room are available in adults and pediatric groups. Small studies are available for inpatient therapy in children and, along with available therapies for children and adolescents, are described in this review. A review of the literature shows growing evidence regarding the use of dihydroergotamine intravenously once patients are hospitalized. Effectiveness and safety have been proven in the last decades in adults and small studies in the pediatric populations. 相似文献
80.