全文获取类型
收费全文 | 93948篇 |
免费 | 6541篇 |
国内免费 | 4190篇 |
专业分类
耳鼻咽喉 | 751篇 |
儿科学 | 1931篇 |
妇产科学 | 843篇 |
基础医学 | 5929篇 |
口腔科学 | 1707篇 |
临床医学 | 14260篇 |
内科学 | 7688篇 |
皮肤病学 | 371篇 |
神经病学 | 9082篇 |
特种医学 | 6064篇 |
外国民族医学 | 3篇 |
外科学 | 20121篇 |
综合类 | 16497篇 |
现状与发展 | 3篇 |
一般理论 | 2篇 |
预防医学 | 5172篇 |
眼科学 | 1649篇 |
药学 | 7743篇 |
86篇 | |
中国医学 | 3836篇 |
肿瘤学 | 941篇 |
出版年
2024年 | 324篇 |
2023年 | 1659篇 |
2022年 | 2885篇 |
2021年 | 4091篇 |
2020年 | 3726篇 |
2019年 | 3032篇 |
2018年 | 3054篇 |
2017年 | 3362篇 |
2016年 | 3492篇 |
2015年 | 3347篇 |
2014年 | 6281篇 |
2013年 | 7270篇 |
2012年 | 5710篇 |
2011年 | 6340篇 |
2010年 | 5329篇 |
2009年 | 5015篇 |
2008年 | 4945篇 |
2007年 | 4929篇 |
2006年 | 4561篇 |
2005年 | 4017篇 |
2004年 | 3192篇 |
2003年 | 2772篇 |
2002年 | 2336篇 |
2001年 | 2022篇 |
2000年 | 1660篇 |
1999年 | 1372篇 |
1998年 | 1189篇 |
1997年 | 1050篇 |
1996年 | 887篇 |
1995年 | 744篇 |
1994年 | 590篇 |
1993年 | 471篇 |
1992年 | 405篇 |
1991年 | 317篇 |
1990年 | 286篇 |
1989年 | 263篇 |
1988年 | 192篇 |
1987年 | 195篇 |
1986年 | 169篇 |
1985年 | 244篇 |
1984年 | 171篇 |
1983年 | 100篇 |
1982年 | 140篇 |
1981年 | 136篇 |
1980年 | 120篇 |
1979年 | 69篇 |
1978年 | 57篇 |
1977年 | 48篇 |
1976年 | 44篇 |
1975年 | 29篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
Dr. Adil Kabeer M.B.B.Ch. Sigurdur Gunnlaugsson M.D. Charles Coren M.D. 《Diseases of the colon and rectum》1995,38(8):866-872
PURPOSE: A retrospective, 12-year review of neonatal necrotizing enterocolitis was undertaken at a county hospital, with emphasis on presentation signs and symptoms. METHODS: Eighty-two patients with presence of intramural air were included in the study. The following signs and symptoms were studied: evidence of respiratory distress, use of umbilical catheters, white blood cell count and temperature at presentation, time interval from birth to diagnosis and time interval from diagnosis to operative intervention, presence of intramural air, air in biliary tree or free air, changes in abdominal girth, and presence of occult or gross blood in stools. Comparison was done among infants who had surgical or medical treatment, premature and full-term infants, and infants who had neonatal necrotizing enterocolitis less than or more than 20 days after birth. RESULTS: Eleven patients had a fatal outcome, with an overall survival of 87 percent. Sixty-four patients were treated medically and 18 had operative treatment. Mortality of the surgically treated group was 44 percent. Neonates who had surgical intervention had a left shift of the white blood cell count more commonly present, and all had documented abdominal distention. There were 62 premature and 20 full-term neonates in the group. Full-term neonates developed neonatal necrotizing enterocolitis earlier after birth (5.3 days compared with 15.3 days in the premature neonate group). Full-term neonates had a better prognosis in our series. Presentation of symptoms more than 20 days after birth did not change outcome. CONCLUSION: Our results reflect the experience of a community-based hospital. Clinical acumen remains the cornerstone of diagnosis and management. 相似文献
62.
Patrick M. Rao M.D. A. John Kuta M.D. Michele H. Johnson M.D. 《Emergency radiology》1995,2(5):303-304
We present a case in which an open fracture of the ulna penetrated the skull and caused a comminuted, depressed skull fracture
with a large intraparenchymal hematoma containing bone fragments. 相似文献
63.
目的 探索手指屈肌腱在近节指骨段不同范围损伤时对屈指肌腱功能的影响。方法 采用12只成人尸体手指。实验分为:第一阶段屈指肌腱完整,以后四个阶段依次沿近节指骨掌侧小线闭开小央1/4、1/2、3/4及全长。在掌指关节被动屈80°和掌指关节屈80°同时近侧指关节屈100°时,测量指浅屈肌腱(FDS)和指深屈肌腱(FDP)的滑动距离。根据肌腱力臂和滑动距离的关系,得出屈指肌腱在掌指关节处和近侧指间关节及肌腱在近节指骨段的弓弦畸形程度。结果 腱鞘中央1/4切开时,指屈肌腱的滑动距离、力臂均无显著变化;1/2切开后,单纯屈曲掌指关节时的FDS腱和掌指、近节指间关节屈曲时的FDS、HDP腱的滑动距离和力臂较腱鞘完整时显苫增大(P<0.05);切开3/4长度后,FDS、FDP腱滑动距离均有统计学意义变化,FDS、FDP腱力臂平均增加8~9%;全切开腱鞘,FDS、FDP腱滑动距离变化正统计学上有高度显著性(P<0.01),两腱力臂分别增加16%和15%。随腱鞘切开范围增大,FDS、FDP在近节指骨段的弓弦畸形程度也越来越大。结论 从肌腱的生物力学变化可见,近节指骨段腱鞘的小范围损伤如中间1/4以内损伤时,对肌腱功能影响小,可以不予修复;若损伤超过1/2长度,尤其对腱鞘全长损伤,应予以修复以恢复肌腱功能。 相似文献
64.
A retrospective review was done of 69 children and adolescents (7-17 years old) who underwent 75 arthroscopies of the knee during a 5-year period. Girls were overrepresented (71%). Thirty-eight were children under the age of 16. Of 46 injuries, 34 (74%) happened during sports. Children and adolescents were divided into two age groups based on their presumed state of skeletal maturity (boys 9–15 and girls 7–14 in group I and boys 16–17 and girls 15–17 in group II); meniscal lesions were equally common in the two groups, whereas anterior cruciate ligament tears were more common in older children (NS). Eleven of 17 (65%) anterior cruciate ligament lesions were combined with other intra-articular pathology, most often meniscal tears (9/11). As in other studies, half of the prearthroscopic diagnoses were incorrect. A high frequency of incorrect prearthroscopic diagnoses and of combined lesions justifies arthroscopy as an important diagnostic tool in children and adolescents with a history of twisting knee injury or chronic nonspecific knee problems. Girls practising ball games seem to be especially prone to knee injuries leading to arthroscopy. 相似文献
65.
66.
67.
T. Erhan Cosan Baki Adapinar Hamdi Cakli M. Kezban Gurbuz 《European archives of oto-rhino-laryngology》2006,263(4):327-330
The case of a child injured by a knitting needle penetrating transorbitally and intracranially, resulting in carotid cavernous fistula and pontine injury, is reported. After receiving medical and endovascular treatment, the only remaining abnormal neurological manifestation was right peripheral facial nerve palsy. The clinical sequences of events and the demonstration of a pontine lesion leading to peripheral facial palsy are presented. Facial nuclear injury with a penetrating trauma is an extremely rare condition. It is important to identify the anatomical regions injured in penetrating traumas. The lesions must be identified by computerized tomography, magnetic resonance imaging, clinical and laboratory investigation. 相似文献
68.
Assault-injured Adolescents Presenting to the Emergency Department: Causes and Circumstances 总被引:1,自引:0,他引:1
69.
Abstract Pericardial tamponade remains a diagnostic challenge
to the clinician especially when the patient is well compensated
hemodynamically. We report an unusual case
who sought medical help 1 month after having been
stabbed in his chest. An investigation revealed a perforation
of the myocardium and a pericardial tamponade.
The patient survived thanks to a large organized clot
that plugged the perforation. The patient was exposed
to increased risk due to delayed onset, recognition, and
therapy of the tamponade. Most reports on this subject
deal with acute pericardial tamponade. Only few cases
of delayed pericardial tamponade have been reported.
A review of the relevant literature and the therapeutic
approaches are discussed. 相似文献
70.
目的 :为了提高创伤性脑膜炎的治愈率及护理满意度。方法 :对收治的 82例患者在治疗上应用足量有效的抗生素 ,及时处理原发伤 ,反复腰穿以控制感染。在护理上密切观察病情 ,保持气道通畅 ,加强头痛、高热及脑脊液耳、鼻漏的护理 ,保持创口清洁 ,注重健康宣教。结果 :77例治愈 ,5例死亡。结论 :早期诊断、有效处理原发伤及对症护理可促进创伤性脑膜炎的康复 相似文献