全文获取类型
收费全文 | 755803篇 |
免费 | 53991篇 |
国内免费 | 19945篇 |
专业分类
耳鼻咽喉 | 7951篇 |
儿科学 | 22920篇 |
妇产科学 | 11243篇 |
基础医学 | 62510篇 |
口腔科学 | 15434篇 |
临床医学 | 83521篇 |
内科学 | 128794篇 |
皮肤病学 | 10214篇 |
神经病学 | 52552篇 |
特种医学 | 25900篇 |
外国民族医学 | 60篇 |
外科学 | 84219篇 |
综合类 | 105141篇 |
现状与发展 | 64篇 |
一般理论 | 47篇 |
预防医学 | 69191篇 |
眼科学 | 11527篇 |
药学 | 67060篇 |
639篇 | |
中国医学 | 42474篇 |
肿瘤学 | 28278篇 |
出版年
2023年 | 10899篇 |
2022年 | 16602篇 |
2021年 | 31112篇 |
2020年 | 27712篇 |
2019年 | 32293篇 |
2018年 | 28976篇 |
2017年 | 25542篇 |
2016年 | 25434篇 |
2015年 | 27373篇 |
2014年 | 52159篇 |
2013年 | 53325篇 |
2012年 | 49023篇 |
2011年 | 48483篇 |
2010年 | 40711篇 |
2009年 | 38483篇 |
2008年 | 36800篇 |
2007年 | 36903篇 |
2006年 | 32283篇 |
2005年 | 25432篇 |
2004年 | 18862篇 |
2003年 | 16384篇 |
2002年 | 13315篇 |
2001年 | 11628篇 |
2000年 | 9790篇 |
1999年 | 7913篇 |
1998年 | 7142篇 |
1997年 | 6449篇 |
1996年 | 5567篇 |
1995年 | 5747篇 |
1994年 | 5446篇 |
1993年 | 4381篇 |
1992年 | 4505篇 |
1991年 | 3951篇 |
1990年 | 3524篇 |
1989年 | 3216篇 |
1988年 | 2969篇 |
1987年 | 2622篇 |
1986年 | 2318篇 |
1985年 | 5974篇 |
1984年 | 7043篇 |
1983年 | 5037篇 |
1982年 | 5580篇 |
1981年 | 5248篇 |
1980年 | 4602篇 |
1979年 | 4136篇 |
1978年 | 3416篇 |
1977年 | 2783篇 |
1976年 | 2928篇 |
1975年 | 2142篇 |
1974年 | 1939篇 |
排序方式: 共有10000条查询结果,搜索用时 218 毫秒
91.
《Enfermería clínica》2022,32(1):4-11
ObjectiveTo analyze the quality of care provided during the COVID-19 pandemic, identifying what care has been prioritized and factors that have influenced such care.BackgroundGiven the need to adapt care due to the pandemic, nurses may have been subjected to factors that have negatively affected them, however it has also been possible to find actions that have enabled nurses to maintain the quality of care provided.MethodExploratory study with a sample of 225 nurses. Data collection was performed using a self-assessment of the care provided, the ‘Care Left Undone’ Scale, and ad hoc questionnaire for demographic variables.ResultsThe mean rate of missed care was 5.76. Significant differences were identified according to age, professional experience, field of specialty and personal and professional strategies.ConclusionBoth personal and professional feelings, characteristics, and strategies have an effect in the perception of quality of care provided and missed care during the pandemic. 相似文献
92.
《Vaccine》2022,40(34):5010-5015
ObjectivesTo investigate the association between providing leaflets to support pediatricians in explaining the safety of the human papillomavirus (HPV) vaccine and mother’s decision to vaccinate their daughters in Japan.MethodsIn this cross-sectional study, we conducted a survey of mothers to evaluate the effect of leaflets that were created to support pediatricians in explaining the safety profile of the HPV vaccine. Mothers who provided consent for vaccination before receiving an explanation were excluded from the study. The primary outcome was the mother’s decision to vaccinate their daughters with the HPV vaccine after receiving an explanation from pediatricians using our leaflets.ResultsAmong 161 eligible mothers, 101 decided on HPV vaccination (decided group) and 60 did not (decided against group). There was no difference in the maternal background between the 2 groups. The decided group had a significantly more positive impression of the leaflets than the undecided group. In multivariable logistic regression analysis, a detailed explanation for possible adverse events and specific solutions to them was associated with the mother's decision to have their daughters vaccinated (odds ratio 2.35, 95% confidence interval 1.02–5.44), but not the pathology of cervical cancer and the HPV vaccination process.ConclusionLeaflets emphasizing an explanation of adverse events may contribute to mothers’ decision making for HPV vaccination. 相似文献
93.
94.
《Journal of the American Medical Directors Association》2022,23(11):1861-1867
ObjectivesOlder adults' prior health status can influence their recovery after a major illness. We investigated the association between older adults’ independence in self-care tasks prior to a skilled nursing facility (SNF) stay and their self-care function at SNF admission, discharge, and the change in self-care function during an SNF stay.DesignRetrospective study of 100% national CMS data files from October 1, 2018, to December 31, 2019.Settings and ParticipantsThe sample included 616,073 Medicare fee-for-service beneficiaries who were discharged from an SNF between October 1, 2018, and December 31, 2019.MethodsThe admission Minimum Data Set (MDS) was used to determine residents’ prior ability (independent, some help, dependent) to complete self-care tasks before the current illness, exacerbation, or injury. Seven self-care tasks from MDS Section GG were used to calculate total scores (range 7-42 points) for self-care at admission, discharge, and the change in self-care between admission and discharge.ResultsMost residents (62.0%) were independent, 35.3% needed some help, and 2.64% were dependent in self-care prior to SNF admission. Nearly 25% of residents with urinary incontinence, 28.8% with bowel incontinence, and 31.7% with moderate-severe cognitive impairment were independent in self-care prior to SNF admission compared with approximately 70% of residents without these conditions. Compared with residents who were dependent in self-care prior to SNF admission, those who were independent or needed some help had significantly higher self-care total scores at admission (5.67 vs 4.21 points, respectively) and discharge (6.44 vs 3.82 points, respectively) and exhibited greater improvement in self-care (3.48 vs 1.62 points, respectively).Conclusions and ImplicationsOur findings are evidence that the new MDS item for a resident's independence in self-care tasks before SNF admission is a valid measure of their prior self-care function. This is clinically useful information and should be considered when developing rehabilitation goals. 相似文献
96.
97.
《Vaccine》2022,40(6):904-911
BackgroundGSK initiated a Pregnancy Registry in the United States (US) for the reduced-antigen-content tetanus-diphtheria-acellular pertussis (Tdap; Boostrix, GSK) vaccine with the aim to detect and describe pregnancy outcomes in women vaccinated with Boostrix 28 days before estimated conception or during pregnancy.MethodsVoluntary reports of pregnancy exposure to Boostrix received from spontaneous and post-marketing surveillance sources in the US were assessed. Reports were classified as prospective or retrospective based on the knowledge of pregnancy outcomes at the time of reporting. For completeness, reports of exposure to Boostrix or to the Tdap-inactivated poliovirus vaccine (Boostrix-IPV, GSK) reported to the global safety database from countries outside the US were also evaluated.ResultsFrom May 2005 to August 2019, 1517 (1455 prospective and 62 retrospective) pregnancy reports were received in the Boostrix US Pregnancy Registry. Of the prospective reports, 250 had known outcomes: 244 live infants with no apparent birth defects (BDs), three live infants with BDs, and three spontaneous abortions with no apparent BDs. Of the retrospective reports, 55 had known outcomes: 33 live infants with no apparent BDs, 16 live infants with BDs, one spontaneous abortion with no apparent BDs, four stillbirths with no apparent BDs, and one stillbirth with BDs. Cumulatively, 1321 pregnancy reports (1006 for Boostrix; 315 for Boostrix-IPV) were received from countries outside the US. Of these, 163 prospective reports and 551 retrospective reports had known outcomes. Results were in line with those from the Boostrix US Pregnancy Registry.ConclusionsData currently available from the Boostrix US Pregnancy Registry and from countries outside the US suggested that exposure to Boostrix or Boostrix-IPV during pregnancy does not raise safety concerns related to adverse pregnancy outcomes or BDs. 相似文献
98.
99.
《Cirugía espa?ola》2022,100(11):709-717
ObjectiveMost evidence, including recent randomized controlled trials, analysing anal squamous cell carcinoma (SCC) do not consider immunocompromise patient population. The aim of this study was to compare clinical and oncological outcomes among immunocompetent and immunocompromised patients with anal squamous cell carcinoma.MethodMulticentric retrospective comparative study including 2 cohorts of consecutive patients, immunocompetent and immunocompromised, diagnosed with anal SCC. This study evaluated clinical characteristics, clinical response to radical chemoradiotherapy (CRT) and long-term oncological results including both local and distant recurrence, overall survival (OS) and disease-free survival (DFS).ResultsA total of 84 patients, 47 (55.6%) female, diagnosed with anal SCC from January 2012 to December 2017 were included, 22 (26%) and 62 (74%) patients in immunocompromised and immunocompetent groups respectively. Patients in immunocompromised group were significantly younger (53 vs. 61 years; P=0.001), with smaller tumoral size (P=0.044) and reported higher rates of substance abuse.including tobacco use (P=0.034) and parenteral drug consumption (P=0.001). No differences were found in administered therapies (P=301) neither in clinical response to chemoradiotherapy (83 vs. 100%). Moreover, similar 5-year OS (60 vs. 64%; P=0.756) and DFS (65 vs. 68%; P=0.338) were observed.ConclusionThe present study shows no significant differences in long-term oncological results among immunocompetent and immunocompromised patients diagnosed with anal SCC, with a similar oncologic treatment. This evidence might be explained due to the close monitoring and adequate therapeutic control of HIV positive patients. 相似文献
100.
《Radiography》2022,28(1):39-47
IntroductionThere is global variance in the role of a practicing sonographer. Literature examining global sonographic roles and scope of practice is limited, despite the international applicability of ultrasound imaging. This study aimed to examine the common and divergent features of a practicing sonographer internationally, and their impact upon the development of a global standard of practice.MethodsAn ethically approved mixed-methods online survey was conducted. The purposive sample included all 75 current elected council members of the ISRRT [International Society of Radiographers and Radiological Technologists], an international professional organisation.ResultsThirty-six individuals from at least 32 different countries responded, reflecting the sonography profession in all four ISRRT regions. The results suggest that sonographer education requirements differ widely, from on the job training (16%, 6/36) to undergraduate or postgraduate schooling (44%, 16/36). Registration and accreditation bodies were present in the jurisdiction of 41% (14/34) and 35% (12/33) of respondents respectively, though many were voluntary, physician-focused or non-specific to sonographers. Five of 11 (45%) respondents suggested that the sonographer–radiologist relationship is individual-dependent, and not primarily positive or negative. Ten of 28 (36%) suggested that other professionals do not know the role of the sonographer.ConclusionThe majority of ISRRT council member respondents believe that an international scope of practice could benefit and be implemented in their jurisdiction (26/28, 93% and 22/33, 67%). The key advantages noted were standardisation of education and improved professional mobility. However, lack of sonographer education and radiologist acceptance are important potential barriers.Implications for practiceAn international scope of practice could be beneficial and implementable in most ISRRT jurisdictions. Professional mobility and education standardization are the primary advantages. Insufficient sonographer education and physician acceptance are the key potential obstacles. 相似文献