全文获取类型
收费全文 | 1949篇 |
免费 | 137篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 26篇 |
儿科学 | 51篇 |
妇产科学 | 63篇 |
基础医学 | 221篇 |
口腔科学 | 59篇 |
临床医学 | 161篇 |
内科学 | 441篇 |
皮肤病学 | 116篇 |
神经病学 | 136篇 |
特种医学 | 55篇 |
外科学 | 336篇 |
综合类 | 6篇 |
预防医学 | 71篇 |
眼科学 | 44篇 |
药学 | 130篇 |
中国医学 | 13篇 |
肿瘤学 | 161篇 |
出版年
2023年 | 24篇 |
2022年 | 47篇 |
2021年 | 80篇 |
2020年 | 44篇 |
2019年 | 51篇 |
2018年 | 63篇 |
2017年 | 51篇 |
2016年 | 64篇 |
2015年 | 63篇 |
2014年 | 72篇 |
2013年 | 77篇 |
2012年 | 113篇 |
2011年 | 111篇 |
2010年 | 63篇 |
2009年 | 55篇 |
2008年 | 98篇 |
2007年 | 87篇 |
2006年 | 96篇 |
2005年 | 91篇 |
2004年 | 82篇 |
2003年 | 91篇 |
2002年 | 94篇 |
2001年 | 44篇 |
2000年 | 38篇 |
1999年 | 26篇 |
1998年 | 12篇 |
1997年 | 12篇 |
1996年 | 10篇 |
1995年 | 12篇 |
1994年 | 13篇 |
1993年 | 8篇 |
1992年 | 27篇 |
1991年 | 20篇 |
1990年 | 28篇 |
1989年 | 22篇 |
1988年 | 28篇 |
1987年 | 17篇 |
1986年 | 14篇 |
1985年 | 21篇 |
1984年 | 14篇 |
1983年 | 14篇 |
1980年 | 6篇 |
1978年 | 6篇 |
1975年 | 6篇 |
1974年 | 10篇 |
1972年 | 8篇 |
1969年 | 7篇 |
1968年 | 7篇 |
1967年 | 7篇 |
1966年 | 5篇 |
排序方式: 共有2090条查询结果,搜索用时 15 毫秒
31.
32.
Junya Kaneko Takashi Tagami Chie Tanaka Kentaro Kuwamoto Shin Sato Ami Shibata Saori Kudo Akiko Kitahashi Masamune Kuno Shoji Yokobori Kyoko Unemoto 《Journal of stroke and cerebrovascular diseases》2021,30(8):105926
ObjectiveRebleeding of aneurysmal subarachnoid hemorrhage (aSAH) is one of the significant risk factors for poor clinical outcome. The rebleeding risk is the highest during the acute phase with an approximate rebleeding rate of 9-17% within the first 24 h. Theoretically, general anesthesia can stabilize a patient's vital signs; however, its effectiveness as initial management for preventing post-aSAH rebleeding remains unclear. The purpose of this study was to determine the feasibility and safety of ultra-early general anesthesia induction for reducing the rebleeding rates among patients with aSAH.Materials and methodsWe retrospectively evaluated patients with aSAH who were admitted to our department between January 2013 and December 2019. All the patients underwent ultra-early general anesthesia induction as initial management regardless of their severity. We evaluated the rebleeding rate before definitive treatment, factors influencing rebleeding, and general anesthesia complications.ResultsWe included 191 patients with two-third of them having a poor clinical grade (World Federation of Neurological Society [WFNS] grade IV or V). The median duration from admission to general anesthesia induction was 22 min. Rebleeding before definitive treatment occurred in nine patients (4.7%). There were significant differences in the Glasgow Coma Scale score (p = 0.047), WFNS grade (p = 0.02), and dissecting aneurysm (p <0.001) between the rebleeding and non-rebleeding patients. There were no cases of unsuccessful tracheal intubation or rebleeding during general anesthesia induction.ConclusionUltra-early general anesthesia induction could be performed safely in patients with aSAH, regardless of the WFNS grade; moreover, it resulted in lower rebleeding rate than that reported in previous epidemiological reports. 相似文献
33.
M Chang H Kim R Shigematsu H Nho T Nishijima K Tanaka 《International journal of aging & human development》2001,53(1):35-49
The relationship between functional fitness status and life satisfaction was assessed in older Japanese people from the perspective of quality of life (QOL). A total of 123 older men and women (M = 74.3 years, SD = 5.4) participated in the study. The questionnaire contained 21 questions covering eight structural factors pertaining to the feelings of life satisfaction in older people. The functional fitness test consisted of nine items representing the following five areas of fitness: muscular strength, agility, coordination, balance, and flexibility. The analysis revealed no overall correlation between the total fitness and the total life satisfaction scores, but some of the life satisfaction factors were significantly related to some functional fitness items (P < .01). The results suggest it is important for older people to maintain their functional fitness in order to manage a high quality of life. 相似文献
34.
35.
Tomoko Noma Mai Kabayama Yasuyuki Gondo Saori Yasumoto Yukie Masui Ken Sugimoto Hiroshi Akasaka Kayo Godai Atsuko Higuchi Yuya Akagi Yoichi Takami Yasushi Takeya Koichi Yamamoto Kazunori Ikebe Yasumichi Arai Tatsuro Ishizaki Hiromi Rakugi Kei Kamide 《Geriatrics & Gerontology International》2020,20(7):720-726
36.
Toshiya Endo Sugako Sanpei Akira Komatsuzaki Saori Endo Akiko Takakuwa Kenji Oka 《Odontology / the Society of the Nippon Dental University》2013,101(2):216-221
The aim of this study was to explore the patterns of tooth agenesis in Japanese orthodontic patients with bilateral agenesis of mandibular second premolars. A total of 80 Japanese orthodontic patients with 2 congenitally missing mandibular second premolars were selected as the subjects of this study (experimental group). Another 80 individuals without bilateral agenesis of mandibular second premolars were collected for comparison (control group). The 2 groups were matched with regard to sex. Radiographs, dental casts and records of medical and/or dental treatment were used to identify tooth agenesis. The Chi-square test, odds ratio, and test for equality were used to make statistical comparisons. The prevalence rates of other types of tooth agenesis were significantly higher in the experimental group than in the control group. The occurrence of agenesis of maxillary and mandibular lateral incisors and third molars, and maxillary second premolars was also significantly higher in the experimental group than in the control group. Significantly increased prevalence rates of symmetrical tooth agenesis, with third molars included, and oligodontia were observed in the experimental group. Japanese subjects with bilateral agenesis of mandibular second premolars are at significantly high risk of agenesis of other types of permanent teeth, symmetrical tooth agenesis and oligodontia. 相似文献
37.
38.
39.
40.
Differential effects of adipose tissue stromal cells on the apoptosis,growth and invasion of bladder urothelial carcinoma between the superficial and invasive types 下载免费PDF全文