全文获取类型
收费全文 | 81234篇 |
免费 | 6176篇 |
国内免费 | 259篇 |
专业分类
耳鼻咽喉 | 915篇 |
儿科学 | 2088篇 |
妇产科学 | 1139篇 |
基础医学 | 10974篇 |
口腔科学 | 859篇 |
临床医学 | 8663篇 |
内科学 | 17313篇 |
皮肤病学 | 910篇 |
神经病学 | 8218篇 |
特种医学 | 3150篇 |
外科学 | 13041篇 |
综合类 | 932篇 |
一般理论 | 92篇 |
预防医学 | 6082篇 |
眼科学 | 1974篇 |
药学 | 5542篇 |
中国医学 | 94篇 |
肿瘤学 | 5683篇 |
出版年
2023年 | 672篇 |
2022年 | 1048篇 |
2021年 | 2430篇 |
2020年 | 1367篇 |
2019年 | 2218篇 |
2018年 | 2552篇 |
2017年 | 1814篇 |
2016年 | 1910篇 |
2015年 | 2230篇 |
2014年 | 3234篇 |
2013年 | 4107篇 |
2012年 | 6559篇 |
2011年 | 6824篇 |
2010年 | 3722篇 |
2009年 | 3272篇 |
2008年 | 5467篇 |
2007年 | 5654篇 |
2006年 | 5264篇 |
2005年 | 5206篇 |
2004年 | 4709篇 |
2003年 | 4325篇 |
2002年 | 3906篇 |
2001年 | 673篇 |
2000年 | 482篇 |
1999年 | 625篇 |
1998年 | 809篇 |
1997年 | 611篇 |
1996年 | 505篇 |
1995年 | 452篇 |
1994年 | 432篇 |
1993年 | 425篇 |
1992年 | 321篇 |
1991年 | 262篇 |
1990年 | 219篇 |
1989年 | 226篇 |
1988年 | 196篇 |
1987年 | 178篇 |
1986年 | 164篇 |
1985年 | 180篇 |
1984年 | 205篇 |
1983年 | 171篇 |
1982年 | 252篇 |
1981年 | 264篇 |
1980年 | 182篇 |
1979年 | 131篇 |
1978年 | 145篇 |
1977年 | 116篇 |
1976年 | 84篇 |
1975年 | 69篇 |
1974年 | 68篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
Julian Ashley Feller Andrew A. AmisJack T. Andrish M.D. Elizabeth A. ArendtPieter J. Erasmus M.D. Christopher M. Powers Ph.D. P.T. 《Arthroscopy》2007
This review presents objective data, as far as possible, about the current understanding of the biomechanics of the patellofemoral joint as it pertains to the management of patellofemoral problems. When faced with a patellofemoral malfunction, it is important to check all the soft-tissue and articular geometry factors relating to the patella locally and not to neglect the overall lower limb alignment and function. It is important to remember that small alterations in alignment can result in significant alterations in patellofemoral joint stresses and that changes in the mechanics of the patellofemoral joint can also result in changes in the tibiofemoral compartments. Surgical intervention for patellofemoral problems needs to be planned carefully and take into account an individual’s anatomy. 相似文献
73.
74.
75.
76.
Late-onset and Recurrent Neonatal Group B Streptococcal Disease Associated with Breast-milk Transmission 总被引:2,自引:0,他引:2
Michael Kotiw Gwang W. Zhang Grant Daggard Elizabeth Reiss-Levy John W. Tapsall Andrew Numa 《Pediatric and developmental pathology》2003,6(3):251-256
The purpose of the study was to determine the epidemiological relationships in three unrelated cases of neonatal late-onset Group B streptococcal (GBS) disease and maternal breast-milk infection with GBS. All deliveries were by cesarean section; case 1 was at term, and cases 2 and 3 were at 32- and 33-wk gestation, respectively. Case 1 relates to a mother with clinical mastitis and recurrent GBS infection in a 20-day-old male infant. Following antibiotic therapy and cessation of breast-feeding, the infant recovered without sequelae. Case 2 refers to a mother with clinical mastitis and the occurrence of late-onset GBS disease in 5-wk-old male twins. Despite intervention, one infant died and the second became ill. Following antibiotic therapy and cessation of breast-feeding, the surviving infant recovered without sequelae. Case 3 refers to a mother with sub-clinical mastitis and late-onset GBS infection occurring in a 6-day-old female twin. Following intervention, the infant recovered but suffered a bilateral thalamic infarction resulting in developmental delay and a severe seizure disorder. Following recovery of GBS from an inapparent mastitis and cessation of breast-feeding, the second infant remained well. Blood cultures from all affected infants and maternal breast milk were positive for GBS. Epidemiological relationships between neonatal- and maternal-derived GBS isolates were confirmed by a random amplified polymorphic DNA polymerase chain reaction assay (RAPD-PCR). This study is significant in that it has demonstrated that maternal milk (in cases of either clinical or sub-clinical mastitis) can be a potential source of infection resulting in either late-onset or recurrent neonatal GBS disease. 相似文献
77.
78.
Susannah V Quisling Vinay A Shah Ho K Lee Bruno Policeni Wendy R K Smoker Coleman Martin Andrew G Lee 《Journal of neuro-ophthalmology》2006,26(1):47-48
A 44-year-old man with right-sided herpes zoster ophthalmicus (HZO) developed ipsilateral third and sixth cranial nerve palsies and first-division trigeminal (fifth cranial nerve) sensory loss. MRI revealed contrast enhancement of the cisternal and cavernous portions of the third cranial nerve and high signal on a FLAIR sequence within the ipsilateral medulla at the presumed location of the trigeminal nucleus and tract. To our knowledge, this is the first report of the combination of these imaging findings in HZO. 相似文献
79.
Merritt W Brown Brenda E Porter Dennis J Dlugos Jeff Keating Andrew B Gardner Phillip B Storm Eric D Marsh 《Clinical neurophysiology》2007,118(8):1744-1752
OBJECTIVE: Interictal spikes in intracranial EEG (iEEG) may correlate with epileptogenic cortex, but review of interictal iEEG is labor intensive. Accurate automated spike detectors are necessary for understanding the role of spikes in epileptogenesis. METHODS: The sensitivity, accuracy and reproducibility of three automated iEEG spike detectors were compared against two human EEG readers using iEEG segments from eight patients. A consensus set of detections was generated for detector calibration. Spike verification was calculated after both human EEG readers independently reviewed all detections. RESULTS: Humans and two of the three automated detectors demonstrated comparable accuracy. In four patients, automated spike detection sensitivity was >70% and accuracy was >50%. In the remaining four patients, EEG background morphology resulted in poorer performance. Blinded human verification accuracy was 76.7+/-6.6% for computer-detected spikes, and 84.5+/-4.1% for human-detected spikes. CONCLUSIONS: Automated iEEG spike detectors perform comparably to humans, but sensitivity and accuracy are patient dependent. Humans verified the majority of computer-detected spikes. SIGNIFICANCE: In some patients automated detectors may be used for mapping spike occurrences in epileptic networks. This may reveal associations between spike distribution, seizure onset, and pathology. 相似文献
80.
Mycoplasma pneumatoceles. 总被引:1,自引:0,他引:1