全文获取类型
收费全文 | 1252篇 |
免费 | 120篇 |
国内免费 | 21篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 38篇 |
妇产科学 | 25篇 |
基础医学 | 151篇 |
口腔科学 | 45篇 |
临床医学 | 101篇 |
内科学 | 324篇 |
皮肤病学 | 27篇 |
神经病学 | 19篇 |
特种医学 | 157篇 |
外科学 | 110篇 |
综合类 | 111篇 |
预防医学 | 78篇 |
眼科学 | 6篇 |
药学 | 62篇 |
中国医学 | 2篇 |
肿瘤学 | 133篇 |
出版年
2020年 | 10篇 |
2019年 | 18篇 |
2018年 | 20篇 |
2017年 | 16篇 |
2016年 | 16篇 |
2015年 | 19篇 |
2014年 | 22篇 |
2013年 | 47篇 |
2012年 | 30篇 |
2011年 | 45篇 |
2010年 | 44篇 |
2009年 | 44篇 |
2008年 | 35篇 |
2007年 | 36篇 |
2006年 | 40篇 |
2005年 | 45篇 |
2004年 | 43篇 |
2003年 | 28篇 |
2002年 | 31篇 |
2001年 | 30篇 |
2000年 | 38篇 |
1999年 | 32篇 |
1998年 | 44篇 |
1997年 | 38篇 |
1996年 | 46篇 |
1995年 | 37篇 |
1994年 | 39篇 |
1993年 | 32篇 |
1992年 | 22篇 |
1991年 | 28篇 |
1990年 | 28篇 |
1989年 | 29篇 |
1988年 | 41篇 |
1987年 | 35篇 |
1986年 | 32篇 |
1985年 | 27篇 |
1984年 | 21篇 |
1983年 | 22篇 |
1982年 | 18篇 |
1981年 | 15篇 |
1980年 | 8篇 |
1979年 | 9篇 |
1978年 | 7篇 |
1975年 | 10篇 |
1973年 | 6篇 |
1970年 | 12篇 |
1969年 | 6篇 |
1968年 | 8篇 |
1966年 | 7篇 |
1962年 | 5篇 |
排序方式: 共有1393条查询结果,搜索用时 15 毫秒
81.
A comparison was performed of three small-gauge, permanent, rare-earth, intraocular magnets to assist the posterior segment surgeon with the decision as to which magnet to purchase or to use in different clinical situations. The magnetic force was measured at varying distances from the instrument tip using a 1/8-inch steel ball as the test object. There were small differences in magnetic strength between the three instruments that may have clinical significance in certain situations. Two of the instruments had a retractable magnet within an outer sleeve, allowing for controlled attraction and release of a magnetic foreign body by the surgeon. 相似文献
82.
83.
84.
This report describes the clinical and cytogenetic findings in a young woman with Bloom's Syndrome, who was successfully delivered of a healthy child 6 years after the diagnosis of the condition. This is the first reported case of pregnancy in a patient with Bloom's Syndrome. 相似文献
85.
In a patient with primary hyperparathyroidism an attempt was made to ablate a middle mediastinal parathyroid gland by forceful staining with radiographic contrast material. The gland was stained on two separate occasions, two weeks apart. Both times the serum calcium level temporarily fell to the normal range but reverted to abnormal levels. The patient ultimately required surgery for correction of hypercalcemia. The mechanism of staining and possible reasons for failure as well as potential complications are discussed. 相似文献
86.
A retrospective review of the dynamic CT studies performed in our institution on head and neck lesions, excluding the brain, was carried out. Five basic types of density vs. time curves were obtained. Dynamic CT scanning is valuable in the differential diagnosis, management, and followup of such cases; its usefulness as an imaging modality in diagnosis and followup of hemangiomas is stressed. 相似文献
87.
88.
89.
Mulcahy MF Wahl AO Small W 《Journal of the National Comprehensive Cancer Network : JNCCN》2005,3(5):637-642
Pancreas cancer is the fourth most common cause of cancer deaths. Even for the small percentage of patients who can undergo surgical resection of the primary tumor, the risk of recurrence remains unacceptably high. For patients with localized disease that is not amenable to surgical resection, pain related to the primary tumor can significantly impair quality of life. Attempts to improve the duration and quality of life for these patients have included both chemotherapy and radiotherapy. The addition of chemotherapy to radiation may enhance the local effects of radiation or provide treatment of disease outside the radiation field. The results of clinical trials evaluating the appropriate therapy for locally advanced or resected disease have been inconsistent. In some instances, the methods used in these studies became outdated before the results were available. Hopefully, advances in radiation techniques and systemic drug therapy will provide more durable and clinically relevant results. Meanwhile, treatment decisions should be tailored to the clinical situation, including consideration of treatment toxicity and therapy goals. Recognizing which patients are likely to benefit from combination therapy or systemic therapy alone is a subject of future and ongoing clinical trials. 相似文献
90.