全文获取类型
收费全文 | 2102254篇 |
免费 | 162718篇 |
国内免费 | 7312篇 |
专业分类
耳鼻咽喉 | 27802篇 |
儿科学 | 62927篇 |
妇产科学 | 55770篇 |
基础医学 | 291248篇 |
口腔科学 | 60775篇 |
临床医学 | 187085篇 |
内科学 | 424120篇 |
皮肤病学 | 47880篇 |
神经病学 | 169280篇 |
特种医学 | 85048篇 |
外国民族医学 | 346篇 |
外科学 | 334797篇 |
综合类 | 46272篇 |
现状与发展 | 3篇 |
一般理论 | 627篇 |
预防医学 | 157613篇 |
眼科学 | 45903篇 |
药学 | 154094篇 |
8篇 | |
中国医学 | 4051篇 |
肿瘤学 | 116635篇 |
出版年
2018年 | 20431篇 |
2016年 | 18846篇 |
2015年 | 21200篇 |
2014年 | 29371篇 |
2013年 | 43777篇 |
2012年 | 55517篇 |
2011年 | 59138篇 |
2010年 | 36326篇 |
2009年 | 35305篇 |
2008年 | 56198篇 |
2007年 | 59657篇 |
2006年 | 61314篇 |
2005年 | 59217篇 |
2004年 | 56713篇 |
2003年 | 55075篇 |
2002年 | 52990篇 |
2001年 | 109075篇 |
2000年 | 112616篇 |
1999年 | 94050篇 |
1998年 | 25604篇 |
1997年 | 22627篇 |
1996年 | 23601篇 |
1995年 | 23169篇 |
1994年 | 21574篇 |
1993年 | 20095篇 |
1992年 | 75502篇 |
1991年 | 73048篇 |
1990年 | 70520篇 |
1989年 | 67844篇 |
1988年 | 62568篇 |
1987年 | 61175篇 |
1986年 | 57527篇 |
1985年 | 55412篇 |
1984年 | 41056篇 |
1983年 | 34741篇 |
1982年 | 20215篇 |
1981年 | 17927篇 |
1980年 | 16805篇 |
1979年 | 36772篇 |
1978年 | 25862篇 |
1977年 | 21976篇 |
1976年 | 19782篇 |
1975年 | 21058篇 |
1974年 | 25014篇 |
1973年 | 23808篇 |
1972年 | 22303篇 |
1971年 | 20765篇 |
1970年 | 19255篇 |
1969年 | 18032篇 |
1968年 | 16640篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
Parupudi V J Sriram Guduru V Rao Nageshwar D Reddy 《Indian journal of gastroenterology》2006,25(1):39-41
Endoscopic clips have been used mainly for control of gastrointestinal (GI) bleeding and occasionally for closure of GI perforations. However, closure of spontaneous esophageal perforation (Boerhaave's syndrome) by clipping has not been reported. We described successful non-surgical closure of spontaneous esophageal perforation by endoscopic clipping in a patient with bilateral pyopneumothorax and septicemia. 相似文献
53.
AIM: The intention was to investigate cerebrospinal fluid pressure (CSFP) and volume of cerebrospinal fluid (CSF) drained during and after thoracic- and thoracoabdominal aneurysm repair. The findings were related to the occurrence of postoperative neurologic deficits. METHODS: Twenty-nine patients (12 with thoracic and 17 with thoracoabdominal aortic aneurysm) were operated without shunting or extracorporeal circulation. For monitoring of CSFP an intrathecal catheter was placed in all patients. The volume of CSF withdrawn intraoperatively, on the day of operation as well as on the 1st and 2nd postoperative day was recorded. RESULTS: Twenty-six patients had no postoperative neurologic sequelae. One patient had postoperative paraplegia while 2 had paraparesis. The three patients with neurologic sequelae had higher CSFP intraoperatively than those without neurologic symptoms (P=0.04). Median CSFP during aortic cross-clamping was 19 mmHg and 10 mmHg and the median volumes of CSF drained on the day of operation 210 and 85 mL in the two groups, respectively. There was a significant positive correlation between CSFP and central venous pressure. CONCLUSIONS: A higher intraoperative CSFP was observed in patients with neurologic sequelae following thoracic- and thoracoabdominal aneurysm repair. Further, there was a tendency of higher volumes of CSF drained in this group of patients. Although, the series is too small to allow firm conclusions, it supports the view that CSFP monitoring and drainage is beneficial during thoracic- and thoracoabdominal aneurysm repair. 相似文献
54.
55.
56.
57.
58.
S Balzer D T Schneider M B Bernbeck M J?ger O Mils J Schaper R Willers R Krauspe U G?bel R Wessalowski 《International journal of hyperthermia》2006,22(6):451-461
PURPOSE: In children with locally advanced or recurrent malignant tumours, prognosis can be improved by regional deep hyperthermia (RHT) in combination with platin-based chemotherapy. However, because of the increasing number of patients that achieve long-time remission with this therapy, it is necessary to evaluate long-term sequelae of thermochemotherapy. During the years 1993-2004 one has observed avascular osteonecrosis (AON) of the femoral head after RHT in seven children with pelvic germ cell tumours or rhabdomyosarcomas. METHODS: Although AON may develop in patients with malignancies treated with chemo- or radiotherapy alone, RHT might nevertheless contribute to the occurrence of AON. In order to determine potential risk factors for AON after RHT, this study analysed the relationship of AON to the patient's age, medical history and treatment parameters such as thermal dose equivalent and power output. RESULTS AND CONCLUSIONS: In the present study AON was associated with young age as well as intensity of hyperthermia indicated by high power levels that exceed 20 W per kg body weight and/or application of eight or more heat sessions as well as additional radiotherapy. Based on this observation, it was assumed that an optimized three dimensional thermal field modelling may be helpful to avoid hazardous temperatures in the femoral heads during RHT treatment and to reduce AON of the femoral heads. 相似文献
59.
60.
JM Martín† L Calduch† C Monteagudo‡ I Molina† D Ramón† V Alonso† E Jordᆠ《Journal of the European Academy of Dermatology and Venereology》2006,20(4):428-431
Cutaneous plasmacytosis is a rare disorder characterized by a benign proliferation of mature plasma cells that appears as multiple dark-brown to purplish skin lesions, often associated with polyclonal hypergammaglobulinaemia. We present the case of a 55-year-old Caucasian man who suffered from a cutaneous plasmacytosis associated with two different carcinomas. Cutaneous plasmacytosis seems to be a reactive process because most cases reported are not associated with any apparent underlying disease. Nevertheless, because few reported cases were associated with malignancies, screening of additional neoplasms would be justified. 相似文献