全文获取类型
收费全文 | 38831篇 |
免费 | 3268篇 |
国内免费 | 127篇 |
专业分类
耳鼻咽喉 | 377篇 |
儿科学 | 966篇 |
妇产科学 | 728篇 |
基础医学 | 4853篇 |
口腔科学 | 1007篇 |
临床医学 | 5654篇 |
内科学 | 7760篇 |
皮肤病学 | 804篇 |
神经病学 | 3192篇 |
特种医学 | 1307篇 |
外国民族医学 | 1篇 |
外科学 | 4718篇 |
综合类 | 552篇 |
一般理论 | 40篇 |
预防医学 | 4549篇 |
眼科学 | 567篇 |
药学 | 2720篇 |
1篇 | |
中国医学 | 37篇 |
肿瘤学 | 2393篇 |
出版年
2022年 | 257篇 |
2021年 | 663篇 |
2020年 | 373篇 |
2019年 | 674篇 |
2018年 | 658篇 |
2017年 | 510篇 |
2016年 | 631篇 |
2015年 | 738篇 |
2014年 | 1038篇 |
2013年 | 1511篇 |
2012年 | 2247篇 |
2011年 | 2216篇 |
2010年 | 1203篇 |
2009年 | 1074篇 |
2008年 | 2022篇 |
2007年 | 2074篇 |
2006年 | 2048篇 |
2005年 | 2013篇 |
2004年 | 1911篇 |
2003年 | 1757篇 |
2002年 | 1809篇 |
2001年 | 1070篇 |
2000年 | 1063篇 |
1999年 | 952篇 |
1998年 | 481篇 |
1997年 | 413篇 |
1996年 | 368篇 |
1995年 | 358篇 |
1994年 | 281篇 |
1993年 | 302篇 |
1992年 | 648篇 |
1991年 | 675篇 |
1990年 | 619篇 |
1989年 | 566篇 |
1988年 | 508篇 |
1987年 | 500篇 |
1986年 | 518篇 |
1985年 | 501篇 |
1984年 | 396篇 |
1983年 | 336篇 |
1982年 | 271篇 |
1981年 | 249篇 |
1980年 | 192篇 |
1979年 | 352篇 |
1978年 | 276篇 |
1977年 | 227篇 |
1974年 | 235篇 |
1973年 | 222篇 |
1972年 | 183篇 |
1971年 | 197篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
122.
123.
124.
Around one-quarter of stoma patients experience clinically significant psychological symptoms post-operatively. Psychological disorders are often not detected by those involved with the care of stoma patients. Past psychiatric history, dissatisfaction with preoperative preparation for surgery, postoperative physical symptomatology and the presence of negative stoma-related thoughts/beliefs have all been shown to be significantly associated with psychological morbidity after surgery. These findings suggest that healthcare professionals (especially surgeons involved with this patient population) should ask all patients about these factors before and after surgery. Questionnaires could be used to screen for difficulties and/or staff could undertake training aimed at improving the detection of psychological morbidity and endeavour to strengthen links with liaison mental health services. Future research in this area should be prospective, using psychometrically valid measures and be focused on the prediction, prevention, detection and treatment of poor psychological adjustment after stoma surgery. 相似文献
125.
126.
Joan Stiles Pamela Moses Katherine Roe Natacha A Akshoomoff Doris Trauner John Hesselink Eric C Wong Lawrence R Frank Richard B Buxton 《Journal of the International Neuropsychological Society》2003,9(4):604-622
The current study presents both longitudinal behavioral data and functional activation data documenting the effects of early focal brain injury on the development of spatial analytic processing in two children, one with prenatal left hemisphere (LH) injury and one with right hemisphere (RH) injury. A substantial body of evidence has shown that adults and children with early, lateralized brain injury show evidence of spatial analytic deficits. LH injury compromises the ability to encode the parts of a spatial pattern, while RH injury impairs pattern integration. The two children described in this report show patterns of deficit consistent with the site of their injury. In the current study, their longitudinal behavioral data spanning the age range from preschool to adolescence are presented in conjunction with data from a functional magnetic resonance imaging (fMRI) study of spatial processing. The activation results provide evidence that alternative profiles of neural organization can arise following early focal brain injury, and document where in the brain spatial functions are carried out when regions that normally mediate them are damaged. In addition, the coupling of the activation with the behavioral data allows us to go beyond the simple mapping of functional sites, to ask questions about how those sites may have come to mediate the spatial functions. 相似文献
127.
128.
PURPOSE: The purpose of this study was to develop and evaluate measures reflecting the onset of tense marking for children between the ages of 2;0 (years;months) and 3;0. METHOD: The validity of 4 cumulative measures of tense marker emergence and productivity was evaluated relative to existing measures of early grammatical development in a sample of 20 children followed longitudinally. Fourteen children were at risk for specific language impairment (AR-SLI group), and 6 children had low average language abilities (LA group). RESULTS: All measures of onset were highly correlated with the traditional measures; however, children's progress toward mastery of grammatical tense marking was best explained by the productivity of their tense marking systems. Finally, the onset measures imposing productivity requirements best differentiated children in the LA group from those in the AR-SLI group. CONCLUSIONS: The clinical implications for using the late onset of tense marking to improve the early identification of SLI are discussed. 相似文献
129.
Myrna E. MS RN CPAN CAPA Pamela E. MS RN CNA CPAN CAPA Joseph F. DNSc CRNA 《Journal of PeriAnesthesia Nursing》2006,21(6):404-410
Complementary modalities, used alone or in combination with pharmacologic therapies, play an important role in the prevention and management of postoperative nausea and vomiting (PONV) and post discharge nausea and vomiting (PDNV). This article will review the evidence for the effective use of complementary modalities: acupuncture and related techniques, aromatherapy, and music therapy that may be integrated in the perianesthesia nurse's plan of care to prevent or manage PONV. 相似文献
130.
D K Benjamin R Schelonka R White H P Holley E Bifano J Cummings K Adcock D Kaufman B Puppala P Riedel B Hall J White C M Cotton 《Journal of perinatology》2006,26(5):290-295
OBJECTIVES: Very low birth weight (VLBW) infants are vulnerable to nosocomial infections and subsequent morbidity; including infections caused by Staphylococcus aureus: 85% of nosocomial S. aureus infections are caused by capsular polysaccharide (CPS) types 5 and 8. Altastaph is a polyclonal investigational human immunoglobulin G (IgG) with high levels of opsonizing S. aureus CPS types 5 and 8 IgG. METHODS: A Phase 2 clinical trial to assess the safety and kinetics of Altastaph in VLBW infants. Neonates in this multicenter study were randomized to receive two identical 20 ml/kg i.v. infusions of either 0.45% NaCl placebo or 1000 mg Altastaph/kg. Each infant was followed for 28 days after the second infusion or until discharge. Serum S. aureus CPS types 5 and 8 IgG levels were measured preinfusion and at various times after each infusion. RESULTS: Of 206 neonates, 158 received both infusions. Adverse events were similar in the two treatment groups. Six subjects (3% in each group) discontinued owing to an adverse event. Geometric mean anti-type 5 IgG levels were 402 and 642 mcg/ml 1 day following infusion of the first (day 0) and Second (day 14) doses, respectively, in neonates < or =1000 g and slightly higher in neonates 1001 to 1500 g. Trough levels before second infusion were 188 mcg/ml. Type 8 IgG levels were similar. Geometric mean IgG levels among placebo recipients were consistently <2 and <5 mcg/ml for types 5 and 8 in both weight groups. Three episodes of S. aureus bacteremia occurred in each arm. CONCLUSIONS: Infusion of Altastaph in VLBW neonates resulted in high levels of specific S. aureus types 5 and 8 CPS IgG. The administration of this anti-staphylococcal hyperimmune globulin was well tolerated in this population. 相似文献